@BuZz Oooooh, yeah, I was thinking overscan_scale was a proportional scale, which didn't work for me. I'll uncomment the line tomorrow when I get back to it.
Yes, all my values are negative. I was originally having an issue where with overscan on, there was still a black border around the whole image. Negative values let me adjust the overscan so it was appropriate. The comment left in the configuration file by the dev told me to do it. If it was indeed an exploited bug, then maybe it's just ignoring the negative and treating it as positive. Lol. Aspect ratio is 3:2 on everything as well.