I'm not sure what you mean. Your gallery uses showSplashPage="NEVER" and buttonBarPosition="NONE" so the gallery is never expanded (from either the Splash Page or the Expand Button) and therefore never exited from.

There are, however, a couple of things I noticed which might help with any problems you are having.

(1) You have duplicate <script> tags at the top of your gallery's embedding code.
Change:

<!--START JUICEBOX EMBED-->
<script src="/gallery/welcome/jbcore/juicebox.js"></script>
<script>
<!--START JUICEBOX EMBED-->
<script src="/gallery/welcome/jbcore/juicebox.js"></script>
<script>
new juicebox({
baseUrl: '/gallery/welcome/',    
containerId: "juicebox-container",
galleryWidth: "100%",
galleryHeight: "275",
backgroundColor: '#FFFFFF'
});
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->

... to:

<!--START JUICEBOX EMBED-->
<script src="/gallery/welcome/jbcore/juicebox.js"></script>
<script>
    new juicebox({
        baseUrl: "/gallery/welcome/",
        containerId: "juicebox-container",
        galleryWidth: "100%",
        galleryHeight: "275",
        backgroundColor: '#FFFFFF'
    });
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->

(2) Your gallery uses Juicebox-Pro v1.4.4. The current version is now v1.4.4.1 (a small update to address a couple of bugs).
You might like to try upgrading your gallery to the latest version.
Full instructions for downloading the latest version and for upgrading existing galleries can be found here.

If these notes don't help, then please explain further what your problem is and hopefully I'll be able to help further.
Thank you.