I think everyone will need to resync their wallets (pools and exchanges) too the new chain created by Suprnova.
Any transaction made after Supr's chain took over will be gone more than likely. I don't see how there is another way except to wipe all with a new fork and relaunch.... this is a mess.
But for now ill go with what I do know... Suprnovas chain/pool is the one to be on now.
I will wait before I send any BTG to yobits etc. until we know they are on the new chain. Just store your coins on Supr's pool wallet for now I guess lol