Nope, that method originally got it unstuck, but the main army stack refuses my orders and goes into what looks like "explore" mode, no matter what I do. This particular game appears to be a wash. Very strange.
I just had this happen as well, with the added benefit of my main army (with Tarth Sovereign in it) coming partially under AI control after a few reloads got it unstuck. Now when I try and move them, the stack moves one space, then the AI sets some new destination for it some squares away, and pulls it one square in that direction. Had to give up on the game after reloads failed to clear the weirdness... This happened right after I took an enemy outpost; not sure i