Hello, I submitted one of your images to nova.astrometry.net and I see this:
Center (RA, Dec)
50.025, -85.317)
Center (RA, hms):03h 20m 06.087s
Center (Dec, dms):-85° 19' 02.717"
Size:26.7 x 17.8 deg
Radius:16.071 deg
Pixel scale:47 arcsec/pixel
I think that's too wide an image, frankly. The more sky you include, the harder it is to match stars as optical distortion kicks in. I would try using a different optical system with less than half that scale, that is, under 20 arcsec/pixel and I would be more comfortable with something under 10. About 3 fingers of sky should be enough.
Themos