Corrected entry: When Phoebe and Joey are arguing about Phoebe's guitar teaching lessons, Monica comes in between them and gets her picture taken with them. Who takes the picture? Monica, Joey and Phoebe are all in the picture, Ross is on his date, Rachel is out (she comes in just after the picture is taken) and Chandler isn't there either (he is on the phone to Monica when Rachel picks up the phone). So who did it? There is no furniture there for Monica to have put it high enough to get them all in if she'd set the timer, either.
Corrected entry: Ross goes into Ben's room to kiss him goodnight. While he's in there, Monica and Chandler leave to do 'laundry,' Phoebe leaves, and Joey and Rachel have their dialogue. He's in there for a long time, but worst of all is that he doesn't hear Joey and Rachel's shouting, which he really should have heard, being less than fifteen meters away on the other side of a door we've seen several times can easily be heard through.