Re: How to move sims to university dorms?

In the future if you wish to edit university dorms which have sims living in them, open the cheats bar and enter "testingcheats true" and then press enter, and then type "bb. enablefreebuild". This should allow you to edit lots you are not usually able to edit, including university dorms. 

As for Fletcher, you cannot move a sim when they have started a semester. To get Fletcher back into the dorm, you will have to place him on another lot and play him, manually enrolling him back in university. Since Fletcher is on probation when you first play him, that may add an issue to re-enrolling him.