users shouldn't be allowed to assign more than one schedule to a section (?)

[Philipp Schroeder]

By mistake, more than one schedule (i.e. term + school timetable) were assigned
to a single section, causing "mistaken" events in calendars.
Therefore, it is probably a good idea to prevent the user from assigning more
than one schedule to a section. At least some sort of warning text should be
displayed...?

Side note: In my particular case, the two schedules were almost identical,
causing "duplicate" events in the calendar. This added to the confusion when
dealing with the bug "personal calendar shows every event twice". (
http://issues.schooltool.org/issue367 )

[Tom Hoffman (tom-hoffman)]

The reason for allowing it is so that a class can be added to two consecutive terms (common in US primary
and secondary schools). I would say, aside from possibly adding a warning here, the main problem is that
you can't unassign a term to a section.

[Jeffrey Elkner (jelkner)]

I just added the exact same schedule to the same section term twice. I did this because I was trying to quickly to the repeated adding of the schedule, which I need to do 4 times for each section, once for each term.