I know exactly what you mean about Ernie, when I think back to when that "Dance myself to sleep" sketch was on, I kept wondering - what was the whole purpose of taking Bert (in his bed) outside for? And as soon as it happens, Ernie gets into his own bed (with a grin on his face), and starts to fall asleep - while we see Bert looking in on him from outside.
In some ways I felt the same way when they showed that sketch where Ernie had to explain to Bert (step by step), that he "accidently" broke the cookie jar. When they get to the end however, Bert get uptight with Ernie because he put the fish and water into Bert's cowboy hat, and Ernie has the nerve to say the following statement: "Yeah, so?" at Bert.
So yeah, I agree - Ernie is quite the sarcastic one, but at least he got his "just desserts" from the Count's sleepover. I think Bert should ask the Count to come over more often, to put Ernie in his place.
squirrelboy