Hi,
I bought a MG30FX with footswitch. I was convinced I could set 4 channels the way I wanted and simply controlling them with the footswitch.
Well maybe it’s my fault but it doesn’t work that way. You control the first two sounds with the 1 button, you control the second two sound with the second. Button 3 is the same as the 2 and If I press the 4 it appears the tuner. It’s very limiting considering I wanted 4 indipende choices of my own style.
All what you have described are factory settings of your footswitch. Read page 9 of your amp manual here