@Nocturnal -- Yes, I am sure they are both correct!
In other words, Under Format Explorer double-click on FITS and a 'FITS Format Preferences' window opens.
Under Miscellaneous Options, Select "Lower left corner (bottom-up)"
VoilĂ .
Thanks, that's helpful, but am I better off just doing a vertical mirror at some point in the processing since changing that preference will change how all files are read and written? In other words, will I mess up prior images (not that that is too important). Somehow I dislike changing a default setting.
Thanks for the help and clear skies,
--Andy