Both galleries now display OK on my iPod Touch so they should also display on your iPhone.
Try clearing your browser's cache before reloading the galleries.

As the images on your front page link to the galleries on individual separate pages, you may wish to make your gallery dimensions 100% x 100% so that they fill the browser window. In doing so, Juicebox will bypass the Splash Page and display the galleries immediately.

You could also set the Gallery Title in the embedding code rather than in the XML file.
Remove the following line from the 'juicebox.lrwebengine/config.xml' file:

galleryTitle="<%= model.nonCSS.jb_galleryTitle %>"

... and add the following line to the embedding code (immediately after the new juicebox({ line) in the 'juicebox.lrwebengine/index.html' file:

galleryTitle: '<%= model.nonCSS.jb_galleryTitle %>',

Perhaps you could incorporate the version number into the image name itself, e.g. image001_v2.jpg.
If the browser sees a new image name, then it will have no option but to fetch it from the server.

This is a known issue to which there is no known fix other than entering XML entities into the Gallery Title text field in their escaped forms as below:

& (Ampersand)                  ->    &
< (Left angle bracket)         ->    &lt;
> (Right angle bracket)        ->    &gt;
" (Straight quotation mark)    ->    &quot;
' (Apostrophe)                 ->    &apos;

The <div> into which the gallery is embedded is placed in your web page above the <table> containing your links.
Move the code:

<div id="juicebox-container"></div>

... to below the closing </table> tag in your page.

Incidentally, you have two 'juicebox-container' <div>s on your page next to each other. You can safely delete one of them.

If using WordPress, perhaps something like the Google Analytics for WordPress plugin would be a good solution.
Otherwise, try searching the WordPress Plugin Directory with search terms such as 'hit counter' for other suggestions.

A Juicebox gallery's 'index.html' page is just a regular HTML page and you can insert tracking code (for example from Google Analytics, StatCounter or YellowTracker) into the page like you would any other page.
If you are embedding your galleries into existing web pages alongside other content using the recommended embedding code, then insert your tracking code into those pages instead of the gallery 'index.html' pages (which would become redundant).

You should not access the 'full.html' page directly. (If you do, you will see the 'Juicebox Error: Config XML file not found.' message.) It is used internally by Juicebox when the gallery is displayed fullscreen on mobile devices.
The page you should open in your browser is the HTML document into which you are embedding your galleries.

Taking one of your galleries as an example:

<div id="juicebox-container2">
<!--START JUICEBOX EMBED-->
<script src="jbcore/juicebox.js"></script>
<script>
new juicebox({
containerId : "juicebox-container2",
galleryWidth: "600px",
galleryHeight: "500px",
backgroundColor: "#222222",
baseURL: "gadesign"

});
</script>

If your entire gallery is contained in the 'gadesign' folder, then:
(1) The page containing the embedding code (above) should be in the same directory as the 'gadesign' folder.
(2) Your 'gadesign' folder should contain a 'jbcore' folder and the path to the 'juicebox.js' file should be:

<script src="gadesign/jbcore/juicebox.js"></script>

(3) There should be a trailing slash in your baseUrl:

baseUrl: 'gadesign/'

If you continue to experience difficulties, please post the URL to the HTML page containing the galleries so that I can take a look.

Reading over the Yola Tutorial Using the File Manager, you will not be able to upload JavaScript files if you are a Yola Bronze user:

Even if you are a Yola Silver or Gold user, it looks like the Yola File Manager simply allows you to upload files into a container from which you can then drag and drop individual files into your web page.
It does not seem to allow you to upload a number of files (such as those required for a Juicebox gallery) and have a publicly accessible URL for each one (like web space on a regular web server).

Therefore, it would appear that Yola is an unsuitable host for a Juicbox gallery and you would have to host your Juicebox gallery elsewhere and embed the gallery into your Yola webpage using an <iframe> (documented as Option #2 here).

If you do not have an account with a regular web host which allows you to upload files and folders to web space via FTP, a suitable host for a Juicebox gallery would be Dropbox.
(1) Download and install the Dropbox client program (from this web page)
(2) Create your Juicebox gallery with the method of your choice (e.g. JuiceboxBuilder-Pro)
(3) Drag and drop the entire gallery folder (not just the contents) into the 'Public' folder within the newly created Dropbox folder on your computer
(4) Navigate towards your gallery's 'index.html' file (within 'username/Dropbox/Public/gallery_folder/'), right-click it and select 'Dropbox -> Copy public link'
(5) Embed your gallery in your Yola web page (using Yola's HTML Widget) by inserting an <iframe> whose 'src' attribute points towards the 'index.html' page within your gallery folder (the URL you copied in Step #4 above), e.g.

<iframe src="URL_to_gallery_index_page" width="800" height="600" frameborder="0" scrolling="no"></iframe>

Adding custom nodes to the XML file may break Juicebox as it will not be expecting new tags or attributes to be introduced.
Even if the new nodes did not break the gallery, they would not be accessible via the Juicebox API as Juicebox would not know anything about them. You would have to parse the XML file manually using DOM techniques to extract the information you require.

.jb-caption-title is, indeed, for the <title>. For the <caption>, use:

.jb-caption-desc {
    color: #ffffff;
}

Thank you for reporting.
This is a known bug which has already been logged and will hopefully be fixed in the next version. Unfortunately, I do not know when this will be.