Hi JuiceFlight!
I just posted a very similar question today! How weird...
Your numbness sounds a bit more familiar. If it's in the ball of the foot and the toes as a combo it might be Morton's Neuroma. Not as sinister as it sounds, but can be related to having laces too tight or an ill-fitting (too tight) shoe. Might be worth looking into as it might be something simple and not the saddle.
If the pelvis is twisted and the back is feeling it, then it could be impinging on a nerve which travels to the foot, but not too sure about that. I am a Pilates instructor and mountain biker and a lot of these types of injuries, especially when one sided, are to do with imbalances in strength. I can highly recommend speaking to your friendly local Pilates instructor and getting some help. I had chronic one-sided back pain (also potentially pelvis related) and Pilates has been my saviour (hence my new career ).
Could still be saddle related though so make sure your's is the right "fit" (both sit bones supported and not hanging over the edges, not too much pressure in any soft tissue area).
Hope this helps...
GumbyGirl