they simply did not fly the rnav approach correctly, or else the airplane would have been higher over the jabara airport.
oh well, a lesson to us all...be careful and then be paranoid
Well, they clearly didn't fly the approach correctly or they wouldn't have found themselves at the wrong airport. However, they were given a 4000 ft crossing restriction at the IAF, which is pretty darn low that far from the intended airport. So, at that point, they were exactly where they were supposed to be, per their clearance.