Don't Push - S6-E2
Continuity mistake: While trying to take a new Family Portrait, after Cameron, Mitchell, and Lily shake out their faces, say cheese and take another photo, Cameron goes to look at the laptop screen and there's a closeup of that newest photo, but when he tells Mitchell to look at the screen it's a different photo - note Lily's goofy eyes, etc.
Character mistake: Hayley is on the phone in the car with Alex and she's holding her phone upside down.
Haley's 21st Birthday - S6-E10
Plot hole: The family mistakenly believes Hayley will be having her first drink. However, there were several instances in earlier episodes where they saw her drinking or drunk, or she admitted she'd been drinking. For example, in the episode "Arrested", the family drove down to bail her out of jail for underage drinking, and they saw the video footage, and the family members who didn't go were informed of the situation.
Continuity mistake: Pepper states in this episode that he doesn't have any kids, but in 4-14 "A Slight at the Opera" he talks about a son he has who is a Navy Seal.
Continuity mistake: When Alex opens the door for Sanjay she is wearing red headphones around her neck, in the shot after that the headphones are gone. Two shots later, they reapear. (00:11:10)
Continuity mistake: Whilst Clare and her new 'best friend' are talking to the flight attendant, the two glasses change from empty to full in the next shot.
Other mistake: When Claire is sitting in first class, the woman she was sitting next to finished her drink while on her angry phone call and asks for more, but about a second later she is drinking it again and it is no longer empty.
Answer: Mitch is upset that his dad doesn't seem to support his getting married. When they talk about Jay's friends not coming to the wedding, Jay makes it seem like Mitch wouldn't want them to come anyways. Mitch sees it as it's actually that Jay doesn't want to invite his friends to his gay son's wedding because he's embarrassed and uncomfortable about having a gay son. Essentially Mitch sees it as if he was marrying a woman, Jay would be willing so spend money on the wedding, host it at the club, and invite all his friends to it.
Bishop73