Thank you for providing the URL to your web site.
As you are embedding only one gallery per web page, there is no need to name your container ids differently (although it will do no harm) as there will be only one gallery container per page and there will be no conflict with any others.
Currently, the problem with your 'Interiors' gallery is that your http://www.finecustombuilding.com/interiors.html page contains the line:
<script src="http://www.finecustombuilding.com/gallery1/jbcore/juicebox.js"></script>
... but the 'juicebox.js' file does not seem to have been uploaded to that location.
I would start by embedding the galleries first and only then, once everything is working as required, would I recommend having your galleries share a 'jbcore' folder.
Essentially, just follow the baseUrl embedding instructions here for one gallery and, once you have got one working, move onto the next.
Upload a complete gallery folder, named 'gallery1' to the root of your web space and that gallery should be displayed on your 'Interiors' page (as the embedding code itself on the http://www.finecustombuilding.com/interiors.html page looks OK).