Near the beginning Jason Stackhouse's shirt has the third the button apparently undone. His shirt is then magically buttoned back up as the scene continues.
Tara goes to visit LaFayette and he goes to the door to let her in, but he pretends to turn an already unlocked deadbolt.
About two minutes in, you see the third button on Jason's shirt is unbuttoned after he removes his tie. In the next shot, he unbuttons the first one and somehow the third one has magically been buttoned.