Im glad you brought up those questions.
the manner of question shouldn't matter as long as it isnt completely ridiculous, whom asks it doesn't matter so long as they have the ability to physically change the map.
As for the whole senior admin thing, i dont think its right for an event day to strip the "senior" admin from his/her rights as the senior admin. So i guess in a sense they could be a douche bag and ruin the fun while there on.
I ment to add in my original post that it might be wise for admins if they do this to maybe not allow double map play. i.e. "bob" gets the question right first and choose to go to little_town, Joe gets the question right first at little town and then says "i want little town again" Due to keeping a consistence map flow going i dont think double maps should be accepted in this matter.