Logan and Michelle both expressed how proud they were of Paedon in the comments on that pic. I'd bet he moved separately from the family, probably to either stay in Vegas or go back to Utah considering how much he still resents their last move.
I was just re-watching the PolygaMexicamist Wedding for the train wreck factor and Amazon automatically started the episode where Mariah asks Meri and Janelle to go to the march with her. What is up with that whole invite-people-over-to-ask-them-a-simple-fricking-question thing?! Couldn't this have been accomplished with a test message and some TH's to recap?