Clean Slate Glitch?

Of course, we also don't know if anything can go over 10 slots yet, either.

It doesn't have to. If you use slots right after you create them, the item never actually has to have more than 1 slot on it at any given time.

There might be a limit on scrolls passed ("+6" after the item), but that's pretty much only a display variable and I doubt they actually check that.