Yeah, dungeon groups are a thing unto themselves now, totally separate from a normal party. I booted one of my guys while I was in a dungeon today because somehow my party was in the wrong order and I couldn't reinvite her. I kept getting a message about her rejecting my invitation. I had to leave the dungeon, make everyone individually leave the dungeon group, and then all leave the party. THEN I could finally reinvite. Annoying.