Yes, I spotted this right away. This was similar to the "erase your memories" thing. I immediately came up with a few theories:
1. Comic books never have accurate covers. You find the scene that the cover references and it's either not even in the comic at all, or it's over the top compared to the real scene. Since Heroes is based on a comic book, maybe they are going for this feel.
2. TV used to do this sort of thing with certain shows (similar to point #1) containing inaccurate cliffhangers to the actual story. Movie previews sometimes use deleted scenes, too.
3. They didn't actually bother to write the next episode until after the previous one was cut, or the writing team wasn't communicating everything correctly.
I suspect it's #3, unfortunately. Like certain HBO and Showtime series, this series stinks of multiple writers that each portray their own view of the characters and storyline. I really hate that. There should be one direction, one vision, and for the top-level story, one writer. Otherwise, you're left with an unpredictable mess with constantly changing characters, and writers that try to fix the previous episodes' mistakes by either pretending they don't exist or writing overly unrealistic means of overcoming them.
Rosalina: But you didn't.
Robert: But I DON'T.
Rosalina: You sure that's right?
Robert: I was going to HAVE told you they'd come?
Rosalina: No.
Robert: The subjunctive?
Rosalina: That's not the subjunctive.
Robert: I don't think the syntax has been invented yet.
Rosalina: It would have had to have had been.
Robert: Had to have...had...been? That can't be right.