When editing the daily schedule calendar for one day, if there is an overlap in time then all blocks appear as having conflicts for all students for the entire semester. For instance, to change a block to finish at 8:45 and you accidentally use PM, then this happens and ADDITIONALLY the AM and PM do not show up on the overall monthly calendar view, so one has to go into every day to determine where the error occurs. This also happens with a one-minute overlap, but one can see that more easily on the monthly calendar (still annoying, as you don't even know this affects the schedule overview calendar until you go look at it).