You need someone who understands this stuff to watch what happens while you ride. I am sitting here wondering what the h***
is going on. I cut a section of plastic milk jug up into something like a C shape. I put it under my innersole on the outside (I pronate). It makes a small difference; about a half a shim's worth. Besides that, I use 2 LeWedges. Do you feel that the soles of your cycling shoes are flexing? Because 4 shims is a lot. It might even be too many. Have you tried three? The only other thought I have is that your ITB may be really pissed off, and that even small amounts of use will set it off.