Tried joining CM story mode (today, and about 3 days before that) and the exact same thing happened. I keep gettting put into a different version of the instance than the rest of my party (of 5). I tried joining through the dialogue, and by entering the portal, from overflow and from the “underflow” or w/e. We all tried exiting and re-entering and I tried relogging. It isn’t level related either since we had another person at the same level.