Your Couples Friends & Neighbors - S1-E3
Continuity mistake: Max finds Dave inside his food truck and shows him the Nanny Cam footage of Dave sleepwalking - but Dave doesn't open his food truck until episode 7.
The Shershow Redemption - S1-E12
Continuity mistake: Jane talks about how perfect a shrimp fountain would be at their second wedding (couldn't have it at the first because his cousin was allergic), but in the first episode of Season 2, you find out she is deathly allergic to seafood as well.
Continuity mistake: When Dave enters the room with champagne glasses to celebrate his terrible idea, in a brief shot as he enters he's holding the glasses upside down. We cut to the other angle when he asks Alex to help him, and they're now held the right way up. As she takes them off him the angle switches again, and they're back to being upside down. (00:12:00)