Toward the end of the movie when Castle and Bishop drive up and soon meet Tollander, you can see the driver-side window going down. However, a few seconds later when they stop where Tollander is standing the window is up.
During the drive-by shooting of Agent Castle, the license plates change from the drive-by vehicle MER 286 to the roll-over vehicle YJ9 569.
After Kehoe shoots the two SWAT officers with the battering ram, another officer with a shotgun enters from the right side of the front door. In the next shot he turns into an officer with an MP5 and the officer with the shotgun enters from the other side of the door.
Agent Castle's sidearm throughout the film appears to be a small .32 semi-automatic, similar to a Walther PPK. However, when Bishop takes it to chase down the drive-by shooters, in one shot it changes to a 9mm pistol.
Just after the SWAT team fires a tear gas round into the safe house, one of the hitmen starts returning fire with an Uzi. In one shot from behind him the Uzi suddenly has a silencer on it.
The hotel window breaks before Bishop kicks the hitman through it.
During the Bosnia scene at the beginning, Tollander is shown puffing on a cigar that is obviously not lit.
A Navy SEAL, when entering a building, would switch to something other than a sniper rifle for close quarters. Not only does Bishop not switch to another weapon, he's not even carrying a sidearm.
When Putney enters the kitchen he says "This better be fucking important," but his mouth doesn't move.
The first hitman who flees the safe house, in the gray jacket and the spiky blonde hair, seems to disappear completely - there's absolutely no sign of him as Sherwood and the other hitman run through the tunnel and he never appears again.
Bishop suggests that he and Castle move the kids away from the safe house because they're in civilian clothes. It doesn't occur to him that the hitmen, who tried to kill both of them just a little while ago, are more likely to recognize them, especially since they're wearing the same clothes as earlier.