Can't Find Vendor Store Layout

I'm trying to edit my current theme's layouts and for some reason when I make edits to them, sometimes I see the changes reflected on the pages, and sometimes nothing changes at all (and yes, I'm clearing my var/cache before checking).

I've also noticed that I can't find my "Vendor Store" layout in the list of available layouts either.

I'm using the "Graceful Theme" if that helps, but I think I made a 'clone' of it so that I didn't mess anything up permanently.

I think you should contact theme developer with these issues. It hard to say anything without theme examination