^ The producers certainly did. Ba-ZING!
No, the producers didn't lose track, they lost their jobs and were replaced.
I took it that he meant they preferred the later theme tune (hence their using it).
^I never felt it made much sense to take the concept of 24 beyond a single season, at least not with the same characters. Some ideas work great in a limited form, but get stretched too far if you try to sustain them indefinitely. (Not that I thought 24 worked great. I gave up on it after 2-3 episodes because Bauer was too violent for me. But I thought it was a clever idea in principle. As a one-season thing, that is. Having the same guy keep getting into equivalent "you have exactly 24 hours to save the world" situations year after year after year was just ridiculous.)
I think the '24 hours to save the world' (or US) thing just requires the same sort of willing suspension of disbelief the viewer needs to afford the Die Hard or James Bond series. Besides, given the nature of CTU, it's perhaps more credible than they find themselves in this situation than e.g. Bruce Willis' John McClane, perenially 'the wrong man in the wrong place at the wrong time.'
And it wasn't always '24 hours to save the world.' For example, in S2, Jack spent the first 12 hours or so trying to stop a nuke going off in LA, then the next 12 trying to stop the US going to war with the wrong country, which had been framed for the attack. S8's first 2/3 were about the attempt to assassinate President Hassan, the last 1/3 about Jack avenging someone. And the 24 hours usually changed from time-frame to time-frame, S1 was the only series set over the course of a single day.
But, all in all, if the relatively restrained Bauer of early S1 (where the most he did was, er, shoot his boss in the leg with a tranquilizer dart - I did say 'relatively restrained') was too much for you, then you were wise to avoid later seasons, given that in S2's opener, he murdered a paedophile in cold blood and then demanded a hacksaw to chop his head off, all so he could infiltrate a terrorist gang!
Same with Heroes. Its first season was great, but that's largely because it was designed to be a single-season story with a beginning, middle, and end. The idea was to start over with mostly new characters and situations in the second season. But the actors proved so popular that the network insisted on keeping them around, even though their stories were already over. And so the next three years were just going through the motions and repeating the first season's formulas. So that's kind of the opposite of this thread's topic -- the show suffered because of what wasn't dropped after the first season.
I never thought of it like that before, but that makes a lot of sense all right. Of course, they could have made great subsequent seasons - S2 could should have been an X2/ Superman 2/ The Dark Knight, compared with season one's pilot/ origin story - but the writing just wasn't there.