Jrwhite would be really curious if you ever get the hdmi switching working
I had shaw cable motorola 3416 or whatever number it was, and every time i switched inputs on my hdmi switcher it would default to its default settings (720p) dont know if thats happening with you. I really hope its not an issue with shaw direct.
Maybe try 4X3 override on.
Its strange though another user is able to switch inputs with no issue. The oppo switch is excellent however.