This is a seat plan that doesn't just have "Visitors" and no block details. Seems away fans are M1 - M3B. As others have said, there doesn't seem to be an M4 marked here, so maybe it's M1, M2, M3 and M4 now.
Regardless, there doesn't seem to be any other blocks that will be released so you can...
It doesn't matter - if you are a season ticket holder they are irrelevant.
My member points are higher than my ST points too. I've not bothered to look into the underlying calculations of each because I know the Member value doesn't apply to me.