Revealing mistake: There is a glimpse of a bench on the porch landing, roughly parallel to the steps where Jake is sitting with his back at about a 45° angle to the railing. Front views of Jake show the bench oddly angled upward as though it ascends like the steps. (00:38:10 - 00:39:12)
Continuity mistake: Jake places a coffee cup onto the table. Amber puts her right hand on the handle and starts to slide the cup towards her body. Amber suddenly holds the cup above her chest with both hands, but doesn't have enough time to raise the cup and place her other hand around it. (00:34:20)