It says you can have a maximum of 20 catergories. I was wondering if NONE counts as one of the 20, or if its 20+none?

No, as far as I know the 'Main' section of the shop doesn't count in. But let me try it to be sure ^^

Okay, the main cathegory doesn't seem to count, but I found out that I was able to create 31+ cathegories :o I stopped there and deleted the cathegories again though...

Yeah, I knew the category limit was glitched - I've seen a post about that before. That's why I didn't just try it and see if I could make them. Well if no one here knows for sure, I'll make a ticket. Wouldn't want to accidentally break the rules :).