3rd monitor blues

[DeckardEdward]

I have a GeForce GTX 970, which I'm using three monitors with. My primary is 1440x900; my secondary and tertiary monitors are both 1920x1080. My primary monitor is situated in the middle, with my secondary on the right and my tertiary on the left. I'm trying to get the DS3 window to render as borderless fullscreen on my third monitor, and I made some progress using the Steam marketplace program Borderless Fullscreen, but something regarding resolution is breaking down with SoulsUnsqueezed, and I can't figure out what it is.

I'm using 0.5.0 on Windows 7.