Johnny 7 - I wasn't aware that visas are geographical (except in certain, particular, circumstances - which are not relevant to M1's)
Curious to know how/why (delete as appropriate) you got a visa valid for travel through MIA but then flew into MCO to use it....did you change your mind as to which school you wanted to use??...or using a previously issued visa for a second trip??
You found a loophole that could be used by somebody else??