I haven't see episode four yet since I had to get my mom (I did record it, though), but from what I've seen of episode five so far, Lin is a big meanie! :D
Let me rephrase the question. Why would you watch episode 5, regardless of when it aired, before having seen episode 4 when you could have waited and seen them in order?
I don't see it as a big deal for just two episodes. Plus, that means I would have had to record episode five and add extra time.