Cryptsy's trading engine is having some issues:
https://twitter.com/cryptsy/status/442791322454601729
Looking at our balance on cryptsy, we have a bunch of accounts with negative values. Going to give it a while longer to let their stuff get sorted, and then I'll dig deeper
You might want to put in a support ticket. You can't trade at all with any negative balances.
About a month ago Cryptsy paid a Dogecoin withdraw of mine three times. Their fix was to give my account a negative Dogecoin balance. I send the Dogecoin back and got some Cryptsy points for doing the right thing.