Okay after arseing around in the car i do belive i have the answer.

If you go for the first memory position called "Flat" and you set it to four channels and then go out of it it returns to 2 channels but strangly enough i stores other changes but if you select any of the others then you can save it and the changes are kept from when you go from 2 channels to four channels.

As i said it is different from 1.02 so it might be that problem not too sure if it is a bug or a feature.