What do you want? For them to put some thought into their music selection? That's silly. I mean, it makes perfect sense that they populate a special about the 80's with the same music from the early 70's that they used in the last special.
I do but I like it! In fact, I just got a new Bowie boxed set that has some mixes of a track that combines "Rebel, Rebel" and a newer Bowie song "Never Gonna Get Old". Pretty great. I usually like hearing the bumper so it triggers that a segment is over (as much as I like the special, sometimes the segments drag on a bit too long).