I was always under the impression that Evek and the Vetar weren't drug in and it was just some other Cardassian ship. Just the conclusion I drew from the facts available. Either way, there's no canon appearance for Evek after Caretaker anyways, so it's open ended. He could be back on Cardassia, he could be aimlessly wondering the Delta Quadrant. Unless of course you buy into the theory that the Caretaker was working with the Cardassians to secretly plot against the Federation... Moral of the story is consistency sucks! Just ask Voyager's writers.