There are some quality problems with that First Choice shot. Take a look at the lettering on the aircraft, which is looking significantly oversharpened. Also there is a lot of grain/?jpeg compression for a centimetre or so around the fuselage and tail. This looks like an editing problem - did you make a selection? It looks like you might have added blur to the sky but left some of that out closer to the aircraft. Also it will get a 'dirty' rejection too. It is not level either, according to A.net.