I wonder if for MnN the numbers are just in the wrong order? or the result is still scrambled?
If I count the numbers directly in the text (so “7時” counts as 2 and “例2” counts as 2)
and don’t count the actual exercise numbers (so “1.” and “1)” both don’t count) I get
毎晩す強勉き which looks like a scrambled 毎晩 勉強 すき
proof: