Independent hip animation not working in Humanoid

I have independent hip control in maya but the exported animation looks wrong in humanoid. I'm assuming its down to the fact only two spine bones can be mapped (my rig has 4 spine bones including the chest). Is this the case? Is there another way to set this up to work properly in humanoid? It works in generic just fine but the game I'm on requires humanoid for other things so changing the system to generic is not possible. What it should look like (using generic) http://files.facepunch.com/alex/2014-07-16_11-19-10.mp4 how it looks using humanoid http://files.facepunch.com/alex/2014-07-16_11-21-25.mp4 Any info greatly appreciated ! ​​