Seeing double

I was wondering when this would happen!

Tyler was in 2nd period P.E. when he had this conversation with one of the three P.E. teachers at the middle school. (not his)

Teacher:  Are you taking two P.E. classes?
Tyler: No.
Teacher:  Then why did I see you in first period P.E.?
Tyler: You didn't.
Teacher: -confused look-
Tyler: You saw my brother.

Oh, the trouble these two could cause!!!!