OK, I'll have a punt into this one as I was responsible for rejecting one of your pictures - the good news for me is that I didn't reject them all, so we screeners must be thinking alike!!!
I'm sorry but all of the pictures you link to show some signs of badscan - particularly of jpeg compression particularly noticable around windows and words. The one I did reject, the Star Alliance pic, also shows a lot of noise in the darker colours, both on the airplane and in the background.
As to a fix... Maximum quality, no compression, and knowing that you're using a digital SLR shoot at the lowest film speed as my own experience suggests that the higher you set the film speed the more likely you are to get low quality results.
There are old pilots and there are bold pilots, but there are no old bold pilots