Sometimes when the handle of the 3-point lock on my Pella door is turned into the lock position the shootbolt at the top does not go up all the way. Then the key will not lock the door. You can reproduce the problem with the door open, so I know it is not a problem of the shootbolt not fitting into the bottom or top plate. I have lubricated the place at the top of the door where the shootbolt pops up.