I have to agree with Higbey, can't believe that I am but he's right. If you promised him a spot as a "Zone Patrol", and he didn't annoy anyone of you nor did any bad stuff or was his behaviour wasn't mature, you should give him the spot.
And as Hig said, Matt is the one to be blamed in this case. Either you punish Matt now, or you just ignore this and give the spot to whom you promised it, otherwise you would male yourself look bad, looking even worse after many people(and me) didn't like iZone, and of course this would be only fair.. what a bummer humans do sometimes.