Default Bus keeps resetting to a Mono In

Every time I load my project I have to reset my default bus to my Stereo In bus, and even when changing windows in Win7 sometimes the Default Bus is changed to a mono in. After changing, it still shows the Stereo In bus as the Default Bus in the Device Connections window, but on the Transport Panel the Audio Activity shows feedback from a mono input.

Correct ASIO driver selected? Tried trashing Prefs?

Yes, I am using the correct ASIO driver. I haven’t trashed my prefs.