Animation Screwing up on Vehicle

I'll start of by saying I am unsure if I should post this in the animation forum or this one, but I thought I would start here as I am sure there is just some sort of flag I am missing.

I am working on a personal project, a hot air balloon, and I wanted the 'pilot' to stand when, well, piloting. To accomplish this is use

llStopAnimation("sit");
llStartAnimation("stand");

I'm not at my main computer or I would send a bigger code sample, but essentially I have this code right after I take controls from the pilot (using pass through FALSE).

The issue is when I descend (using the 'C' key) there is a point in my descent where everything acts as if I am trying to move through an invisible floor, i.e. my legs start folding up under themselves until I am sitting like I am in some sort of kneeling position all pretzel like. The top of my body seems fine. I've turned off all of my animation overrides, etc.

Please let me know if anyone has any ideas.

-Alidar Moxie