The tree they pick from the tree lot is not the same tree that's decorated in their house. The tree became a flocked tree after decorating.
When Uncle Ethan and Kaley leave the girl's bedroom at about minute 58, there is no wreath on the door. When they close the door, there is a wreath.
They have a contest to see who can build a snowman the fastest. When they are finished one of the snowmen are missing.