The Christmas BowGoofs

Gavin (the kid) brings hot chocolate back to his uncle. The cup he is holding has whipped cream well above the rim. At 13:52 Gavin's whipped cream is suddenly about an inch below the rim, then at 13:58 it's back up above the rim in time for him to stick his face in it.

When Grandpa Joe is accompanying Kate in a Christmas song near the end, he is shown holding a guitar, but he is not playing it even though you can hear a guitar playing along.

When Grandpa is looking at the photo album from his POV the whole pages have decorating on them including a stamped header but from the opposite POV the pages appear to be blank as the stamped headers are clearly missing from all the pages.