If you're having problems with your installation of Better Than Wolves, or if you've woken up in the future and are beginning to doubt the nature of reality, here's the place to post about it.
Only the front part of the saw moves, and the sides stay the same, even though the texture itself is different:
Is it to do with the rendering of the saw or am I doing something wrong.
Also, is there a way to only get the texture to apply to a powered saw - currently it plays regardless of its state?
You've animated some invisible portions of the saw blade texture. If you look at the saw in-game, you will see that the blade 10 pixels wide while the saw blade texture is 16 pixels wide.
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The black areas are not visible in-game. The blue areas are the sides of the blade. The red area is the sharp edge of the blade. The sharp edge texture overlaps the side blade texture a little.
Edit: Updated info to include the texture for the sharp edge of the blade.