Corrected entry: When Mollie catches Albert with the designer making out at the clothes store and she soon goes into labor, you see a shot of Mikey and we see him in the wrong position, but then when they are bouncing in the back streets of NYC in James taxi we see Mikey in the right position. For a baby to change into the birth position he or she needs at least 2 full months.
Corrected entry: When that ugly bald guy with the wig comes and meets Mikey and he is watching the 'bear show', That is on Channel 3. Then the bald guy with the wig turns it to football the channel is still on 3. It goes like that a few times over and over again.
Corrected entry: In the scene where Mikey's biological father pays a visit to the house, John Travolta opens the door to him. They have a heated conversation and then there is a scuffle in the hallway and Travolta ejects him. When Molly returns later there are visible signs of a struggle (painting by the door is askew, hat hanging above painting is knocked out of place etc.), however when Mikey's father was ejected, nothing had been touched. Obviously the scene dressers went in and messed everything up, assuming it had been banged into in the fracas.