ZyloxDragon: If you use Galaxy (not sure about Galaxy 2.0), in the upper left corner where the GOG symbol is, click the drop down and click Settings. Click on Features, and there's a checkbox to turn off Auto-Update globally for the games in Galaxy.
As far as it updating even with the option turned on to NOT update the game from the individual game setting... that one I haven't run into myself, so I'm not sure. I'm wondering if turning the globabl option on, restarting Galaxy, then turning it off and restarting it again will fix it?
Thanks, toggling the golobal setting off then on again, turning the setting off in the game settings and restarting seems to have fixed it.