@Cole ********
I wish I could give you a straight answer, but you’re close to a limit and everything is up to the IO you’re standing in front of. Personally I would have done two preparations for myself; 1) Try to get a international flight direct to Chang Mai as they have no reported denials of entries 2) Be prepared to fly to a nearby airport and enter by a land border as they almost certainly will let you in on a tourist visa, unless you use the Poipet border.
You could try to apply for another METV. If they don’t approve it, they will only issue a single entry visa.