The problem you are encountering is likely to be due to captionPosition being used only in Large Screen Mode (and not in Small Screen Mode). (This is noted in the description for the option in the Caption Options section of the Config Options page.)
In Small Screen Mode, captionPosition will always be set to its default value of OVERLAY_IMAGE.

There is much less screen real estate on a mobile device and for the caption text to be legible, it might take up too much space if it has an area of its own.

You could either:
(1) Set a captionBackColor and captionBackTopColor so that the caption can clearly be seen when it is overlaid on top of the image.
... or:
(2) Set screenMode="LARGE" so that the gallery is displayed in Large Screen Mode on all devices and in all browsers (so that all Large Screen Mode options are used).

Please note that priority is given to the main image rather than the caption text.
A long caption may be truncated if the maxCaptionHeight is not large enough. (A long caption will not push the main image up the screen resulting in the image being scaled smaller.)

Thank you for the suggestion.
I recommend that you post suggestions for future versions in the Feature Requests forum thread.
This keeps all the ideas together and ensures that they are not overlooked by the developers.
Thank you.

Check the permissions of your gallery's XML file (and all its parent folders) on your web server to see if maybe they are too restrictive (which might prevent new entries from being written to the file).
Default permissions of 755 for folders and 644 for files should be fine.

If the permissions are fine, then I think Ryan over in the Drupal forum might be the best source of help. As the author of the module, he will be much more familiar with its code and functionality than I am.

If I think of anything else which might help, I'll be sure to post back here.

Thank you for providing the URL to your gallery's web page.

Your gallery's XML file here:
http://devanimals.sandiegozoo.org/juice … cck_blocks
... contains no Pro Options at all.

Please check that you are adding the Pro Options to the correct gallery.

Otherwise, there is a chance that the Pro Options are not being saved or written to the XML file.
After saving the Pro Options, check that they are still listed in the Drupal interface and not missing.

I don't see a Juicebox gallery on your 'reindeer' web page.
It would be much easier for me to help troubleshoot your problem if I could see the problem for myself.
I realise that you may have changed the gallery (being that you have not been able to set up your Juicebox gallery exactly as you like) but, if possible, please recreate the problematic gallery (maybe just on a hidden page somewhere) so that I can take a look and hopefully help further. Thank you.

Incidentally, deselecting the Show Thumbs Button checkbox and setting the following in the Pro Options area should be enough to disable thumbnails.

showThumbsOnLoad="FALSE"
showSmallThumbsOnLoad="FALSE"
showSmallThumbsButton="FALSE"

Also, after making any changes, please be sure to clear your browser's cache before reloading your web page.

You're welcome!

I'm glad things are moving in the right direction.
The following should hopefully work for all elements on the overlay in a default gallery (button bar, caption area, gallery title).
However, I cannot test it in your own web page setup.

/* IMAGE OVERLAY */
.jb-classifier-show-on-over {
    z-index: 2 !important;
}

Also, I cannot be sure that elements such as the button bar and gallery title will not still overlap your hover images if they are positioned 'TOP' rather than on the overlay.
If you ever position elements 'TOP' or want to try changing the z-index for individual elements, then try:

/* CAPTION AREA */
.jb-area-caption {
    z-index: 2 !important;
}

/* GALLERY TITLE */
.jb-area-large-mode-title {
    z-index: 2 !important;
}

/* BUTTON BAR */
.jb-classifier-link-wrapper.jb-classifier-detail-area.jb-classifier-layer {
    z-index: 2 !important;
}

I'm sorry to hear that didn't work.
Unfortunately, without in-depth knowledge of the hover plugin, I do not know what class or classes to apply the z-index to (and it's difficult to determine due to the element being present on the page only when hovering over a link).

Here's something else you can try.
Add the following code to the bottom of the 'wp-content/plugins/wp-juicebox/jbcore/classic/theme.css' file:

.jb-area-caption {
    z-index: 2 !important;
}

I do not know if this will work but it might be worth a try.

Otherwise, I realise that this is not an ideal solution but perhaps you could look into using a different plugin to display your images on hover, one that is still actively developed and supported. It might be worth looking into and could turn out to be an easier solution than you think.

If the problem is not consistent, then this suggests that the issue may lie with either your web server or internet connection.
The code on your web page remains constant so, all being well, the page should be rendered consistently by browsers each time it is loaded. However, if there is a problem with the gallery files not being served to the browser in a timely manner, then the gallery could fail to display.

Also, please ensure that you are always accessing the gallery over wi-fi rather than a 3G or 4G connection.
If you are trying to view the gallery over 3G or 4G, the gallery may fail to display. Please see this FAQ for a solution to this problem:
Why can't I view my gallery on a 3G mobile connection?

Just for the record, I have just viewed your gallery on an iOS device and the gallery's Splash Page displays fine.

However, I notice that your web page contains a few HTML errors.
It would be wise to fix them as some browsers may be more tolerant towards errors than others.
You can check the code on your web page with the W3C Markup Validation Service and then fix the errors reported.
Once the code on your web page validates correctly, your web page should be rendered with greater consistency and predictability across different browsers.

Are you perhaps trying to view your web site on your mobile device via the 'www' subdomain (http://www.citrinesalonnc.com).
If so, it will not work as you hardcode the http://citrinesalonnc.com domain (without the 'www') into the paths in your gallery's embedding code.
Please see this FAQ for details:
My gallery works on 'www.example.com' but not on 'example.com' (or vice versa). Why?

Try using the following embedding code and your gallery should work on both citrinesalonnc.com and www.citrinesalonnc.com.

<script src="/juicebox/jbcore/juicebox.js"></script>
<script>
    new juicebox({
        baseUrl: '/juicebox/',
        containerId: "juicebox-container",
        galleryWidth: "702",
        galleryHeight: "453",
        backgroundColor: "#222222"
    });
</script>
<div id="juicebox-container"></div>

(The leading slashes in the paths above denote your root directory.)

You're welcome!
I'm glad you've got it working. Thank you for posting back to let me know.

The 'juicebox_pro_1.4.4.2.zip' file does contain 33 files (which includes the Lightroom plugin files) so your zip file appears to be complete.
However, you might somehow be looking at just the files rather than the files and folders.

When you extract the 'juicebox_pro_1.4.4.2.zip' file, you should have a folder named 'juicebox_pro_1.4.4.2'.
Inside this folder is a folder named 'adobe-lightroom-plugin'. Inside this folder is the Juicebox plugin for Lightroom (a folder named 'juicebox_pro.lrwebengine').
juicebox_pro_1.4.4.2/adobe-lightroom-plugin/juicebox_pro.lrwebengine

It is the 'juicebox_pro.lrwebengine' folder that you can drag and drop onto your Lightroom desktop shortcurt to install the plugin.
Alternatively, you can follow the manual installation instructions on the plugin's support page.

I hope this helps you to find the plugin.