Did anyone else notice that this should have been Sue's 17th birthday?  Last year they made a big deal about Sue getting to have her birthday on her actual birthday (February 29).  This day, obviously, only comes once every four years and thus her birthday had to have been a multiple of 4.  She turned 16 last  year.

Jim and Pam don't have "two daughters".  They have one daughter and one son.  They kind of made a big deal about it last season when both Angela and Pam wanted to name their sons "Phillip".