That's a bummer. I never could figure out my title issue and, since I also successfully identified my page swipe problem in Moon+ and accepted its spacing problems, I've switched back to that recently. Prestigio's pretty nice, so they should definitely work on their support side. I didn't hear back from them either.
I just tried and I was able to create collections on mine. They leave 'My Books' and only appear within that collection though which was unexpected. Forgot how pretty the white brick background was.
Good luck to you.
[Actually, I just had 2/2 successful titles appear. Perhaps I'll try this out again for a bit. Maybe that means your collection issue will magically fix itself?]