Really? They are checking transactions not in their daemon as they should but based on the side explorer, this is just wrong. As we concluded Minergate must be saving all the unconfirmed transactions in their DB.
If they only will use the latest XDN version there will be no problems at all. But as I said many time - DO NOT USE POLONIEX FOR XDN, there is such a mess there. They are making thousands of dollars, delisting and holding your coins and still are too lazy (or not honest) to make do their business well. Shame on them.