Wacky Drifting with Motion Capture Suit

Hi All,
I’ll post here, even though I know this is about rigging and animation and not specifically motion capture. If you know another motion capture forum, love to hear about it.
We are using a motion capture suit at school. I don’t want to give the details of that here for risk of “slander” of the suit. But it works with several electronic gyro sensors at various parts of the body transiting to a receiver.
Our captured motions are drifting all over the place (the character moves while not really walking).
I am investigating a couple of ideas I have, but want to hear from any one else who has motion capture experience and may have seen something like these problems before.
Here are videos of our renders on youtube,
Thank you