the bottom lip controls pull on the top lip controls a bit. is this normal? i uploaded a video highlighting this. This animation is just to make sure the range and "weight smoothness" is proper. I will be putting it into iclone8 later for mocap testing. just wanted to know if there is potential issues with how these lip controls move together like this. thanks.
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It looks like you are animating the jaw, not the bottom lip control, so in this case, the behaviour is normal. As the jaw comes down in real life, the mouth will open, pulling down the bottom lip and creating a rounded mouth shape. If you manipulate any of the lower lip controls, they should not affect the top lip.
If you want the mouth to stay closed when the jaw drops, you can set "stickyLips" to 1 on the Mouth_Ctrl. You can also tune the "jawFollow" attribute on that control.