Fins, here's what you do. And stop blindly buying shoes and inserts, every foot is different. I have two pair of the following...

[Link: footlevelers.com]

Find a local Chiropractor that carries these, they are awesome and will, odds are, fix your PF. Mine run about $275 a set. I go into my guy (via my BNI group), he has a foot scanner, ya just stand on it like a scale, and they get what they need. Pick them up a week later.

Also while you set up this relationship you should have the Chiro do a couple xrays to take a look. Top to bottom, it's all connected.

Last, pick up one of these, or similar...

[Link: stabilitypro.com]

They keep things stretched out while you're sleeping.