Your 'Available Originals' gallery's XML file does not contain any image information.
Try viewing it directly in a browser: http://lynnmaritpetersonart.businesscat … config.xml
Please check that you have uploaded the correct XML file to the gallery folder on your web server or rebuild your gallery in JuiceboxBuilder-Pro if necessary.

Your 'Available Giclees' gallery seems to display fine (both on its own and embedded) so try clearing your browser's cache before reloading your web pages to see if this helps.

Normally the Juicebox gallery will not be rendered until the Document Object Model (DOM) is ready but your web page seems to have a lot going on in a $(document).ready(function() { }); at the foot of your page.
Maybe if you load your gallery after all your page's custom JavaScript code has been processed, the gallery will appear without the page having to be refreshed.
Try wrapping your gallery's embedding code in a function and run the function at the end of the $(document).ready(function() { }); code.
For example, try replacing:

new juicebox({
baseUrl : 'gallery_giclee/',
containerId: "juicebox-container",
galleryWidth: "100%",
galleryHeight: "100%",
backgroundColor: "rgba(255,255,255,1)"
});

... with:

function loadGallery() {
    new juicebox({
        baseUrl : "gallery_giclee/",
        containerId: "juicebox-container",
        galleryWidth: "100%",
        galleryHeight: "100%",
        backgroundColor: "rgba(255,255,255,1)"
    });
}

... and then replace the last line of your page's custom $(document).ready(function() { }); JavaScript code from:

} catch(e) { if (e && 'function' == typeof e.notify) e.notify(); else Muse.Assert.fail('Error calling selector function:' + e); }});

... to:

} catch(e) { if (e && 'function' == typeof e.notify) e.notify(); else Muse.Assert.fail('Error calling selector function:' + e); }
    loadGallery();
});

Alternatively, if you do not want to manually edit the page created by Muse, then you could try wrapping your gallery's embedding code in its own $(document).ready(function() { }); and introduce a window.setTimeout(); function to delay the normal loading of the gallery (perhaps by half a second or so) to allow your own custom JavaScript to be processed first.
For example, try replacing:

new juicebox({
baseUrl : 'gallery_giclee/',
containerId: "juicebox-container",
galleryWidth: "100%",
galleryHeight: "100%",
backgroundColor: "rgba(255,255,255,1)"
});

... with:

$(document).ready(function() {
    window.setTimeout(function() {
        new juicebox({
            baseUrl : "gallery_giclee/",
            containerId: "juicebox-container",
            galleryWidth: "100%",
            galleryHeight: "100%",
            backgroundColor: "rgba(255,255,255,1)"
        });
    }, 500);
});

Hopefully this will help.