Is a warning! Do not send from multisig to bittrex, send XEM from a non multisig account. They DO NOT support multisignature!
I do not know why BITTREX refuses to send money from a multi-sig account.
What kind of process does it take to transfer money from a multi-sig account?
One of the things I can think of is that if we transfer money from a multi-sig account, we will see two hashes, so many people telling the wrong hash will cause more trouble.
However, whatever you think, there is a problem with BITTREX refusing to send money from the multi-sig account, but if you say so, we have to follow it accordingly.
(It may be better to move to a technical discussion or others on this topic.
Please correspond if necessary. @Saul )
Have you spoken to Bittrex? It would be great to hear what they have to say.