Zain,
I think your shortcut for Free your document windows is wrong! Same for Insert Document to the right of existing tabs
You have ALT+W, F(float) and ALT+W, T(dock)
It should be:
ALT, W, F (float) and ALT, W, T(dock)
There is a big distinction!
If nothing is bound to the shortcut key ALT+W then that will drop down the menu for Tools, but if you have something bound to ALT+W,T, then only
ALT,W,T will select the menu item