more likely that you missed it for the second time
theres a ton of forshadowing that you couldnt have caught the first time because at the time it didnt mean anything
Nah, I didn't miss it this time. Aside from the little foreshadowing comments here and there, there's not much new to catch the second time.
Also, I was looking up an episode over the weekend, and Wikipedia is excrutiatingly detailed with every episode and basically lists every joke and reference on the show. It's pretty good, and is helpful to go back and read after you watch it.