Icarus is just giving me nothing but issues!

I don't know if it's just me, but it's just not doing a very good job at divining the camera motion. I guess I should have used a tripod and not free motion, but come on. The camera was NOT moved very much during filming. Just the normal amount of somebody filming free hand.

But as it is, my character slides around, and doesn't stay where he's supposed to. I've done the Icarus thing over and over, and it just is being stupid!

Also, it's not allowing me to use a clip longer than 172 frames. Anybody else running into this?