I've just tried it here (both going to different pages and closing/re-opening) and I don't see it here. And there's nothing in the code that should do this (it should make Microsoft Sound Mapper the default, but afterwards it shouldn't touch it anymore - so if there's a bug in the code I can somewhat imagine that it would act up on restarts, but definitely not on going to another page and coming back.
Do you have the web interface open, or anything else that might be non-standard?
I am using the web interface to change things as i use a screen reader and the web interface is the only way i can operate the program currently.
Oh! I didn't realize that. I just found a bug that caused some pages (among others the input settings page) to stop sending changes back to the software. That was in the old web interface - are you using the old or the new web interface? I just solved that issue in the old web interface, so please let me know if the next build (building now) works.