Revealing mistake: When Shannon walks into the kitchen and gives Stephanie a hug, in one shot of the highchair where Tommy is sitting there is now a doll.
Fuller House (2016)
1 revealing mistake in season 1 - chronological order
Other mistake: Jackson, and Max are in bed together due to a sickness. When Matt brings Tommy to them you can hear Max say "Say your line" to Jackson. (00:21:55)
Jesse Katsopolis: You forgot one very important thing.
Stephanie Tanner: Have mercy.
Jesse Katsopolis: No... How rude.
Trivia: D.J. throws a life buoy onto a man which says SS Papouli on it. In Full House, Danny buys a boat and names it this in memory of the family's beloved Papouli.