It's not just Cryptsy that seems to be on the wrong fork - none of my test transactions have shown up on CoinEX or CoinedUp either. On top of that, the
blockchain explorer is also on the wrong fork or lagging hardcore. I have a small transaction I sent to Cryptsy a few days ago which should have shown up by now on the blockchain (around block 22014 or so) but of course it's stuck in limbo instead.
Honestly I don't see the exchanges caring too much about fixing their wallets at the moment. They're probably waiting for a more.. definitive fix. It's frustrating as hell mining away and not being able to even send them to an exchange so that I can use it to help increase my total funds - I'm stuck trading with the CAT I currently have on Cryptsy, unless I decide to move to another coin in the meantime (which I'd rather not have to).
Going off what the others have been saying on IRC, I believe we have to update the node(s) hardcoded into the coin itself. From memory the code currently points towards catcoin.pw as being pretty much the only trusted default node (which was shut down just before the fork because the owner couldn't be stuffed putting up with the coin's problems any longer, it seems). I'm pretty sure that's why the exchanges and block explorer are having so many problems syncing. The remaining pool operators came came up with the idea of linking their pools together to prevent any further forks during low difficulty periods, or something along those lines (of course the exchanges likely wouldn't know about this and them updating their node lists before the next hardfork would be a miracle in itself).
As far as I can tell, this is something that can only be fixed with another fork, so it likely won't be done until we have chosen a new difficulty algorithm (which shouldn't take too long hopefully, now that we have this new simulator to play around with) and are ready to implement that as well. I just hope we don't take another month to implement the fix like we did last time, I'm not sure even I have that much patience.
Transactions within the working section of the network (between the pools and user wallets) works well enough though,
so we got that going for us, which is nice.