Yeah this confuses me also, I don't really understand. Here are some hybrids that I heard of so far:

Burm Ball (Burmese x Ball)
Woma Ball (Woma x Ball)
Jag Ball (Jungle Carpet x Ball)
AfRock Burm (African Rock x Burmese)
Carpondro (Jungle Carpet x Green Tree)

I think that's all I heard of so far, if I remember anymore I'll for sure post it up. I like the Burm Ball out of all of the ones I've heard of so far, LOL. xD