Keyboard shortcuts. What am I doing wrong?

I've been trying to map "mute clip" to q ever since I did a full reinstall a few months back, but it just wont stick. I pretty much have to do it every time I open Sonar. Yes I've made sure that Save Changes For Next Session is checked and I've even exported the whole mess over the default key bindings file. I've literally done this dozens of times, any idea why won't it stick?

The keybindings are saved with the lences.
So after you make changes to the shortcuts you have to save the current lence - or exclude shortcuts from the lences.

And removing views from a lens (eg. Piano Roll View) breaks keybindings in some cases too.