[coldtea]

Why weird? Musicians change songs in subsequent albums and live versions (done with different arrangements etc, not just being slightly different) all the time.

And they don't have as heavy external influence as film-makers do, where tens or hundreds of millions are at stake, to the point that they're often denied certain decisions, frequently denied final cut, have different scriptwriters brought in by the producer, and so on. So they often end up with an end result that it's not what they'd wanted (and that's aside from technical and other issues).