Can you take a look at the attached file below?
When the constraint Min hours per day far a teacher is disabled, FET does not respect the constraint. Max two activity tags from N1, N2, N3 per day for a teacher?!
I am sorry, Benahmed, but it is not a bug. The tags must be identical to "N1"', or "N2", or "N3". I saw also your email, but I cannot make "teacher(s) max 2 tags per day out of 3", because of the algorithm.