More Goofs?
1) At Max's house, the missionaries ID themselves using their first & last names. Shouldn't they ID themselves as, "Elder <Surname>?" Also, Joe's missionary partner bails at the fight scene.
2) After Joe rings his girl, the scene cuts to her phone ringing in Utah. But when we cut to the close-up on their photo, one can see part of the empty base of her Trimline phone (suggesting that it's off-hook). We then cut back to the main shot, showing the phone, on-hook & still ringing (just before she answers it).