After, more than a week waiting, Cryptopia finally fixed their wallet and they resent the coins:

https://emercoin.mintr.org/tx/b577b6bbf52e44351af69f426ad534d690dca9bee3a9fcda0f85d091df5ccdea

Now Bittrex wallet is on "maintenance" :\

I don't understand what happened with their wallets, since other exchanges (like Livecoin) are fine.