It looked like a considerable amount of time had occurred from the moment on the church steps of the baptism and everyone was headed to Vegas right after the baptism to the time the movers were at the Corleone home moving things out for the move out West. It seems like that transition would have been a week or so. And Connie shows up on moving day ranting about Micheal having Carlo killed?
Wouldn’t Carlo and Connie have talked that night of the baptism by phone? Her in Vegas and Carlo still at the family house? Her asking him when he could come out to Las Vegas? Timing doesn’t feel right.