Zoom effect on lateral monitors w/TH2G

I'm using FSX w/3 monitors controlled by TripleHead2Go digital version. Everything works well with this setup. The only "quirk" I notice is that the two side monitors have, what appears to be, a moderate zoom effect for the outside views. For example, if I view clouds, or the aircraft wing, in either the right monitor or the left monitor, these objects appear somewhat larger and more elongated than viewing them in the center monitor, as I pan inside the cockpit.Strangely, this is effect is not noticed with the part of the 3d panel that appears in the right monitor. The main panel has the same size/dimensions across both monitors. It's only the outside view (clouds, wing, land features etc.) that have the zoom effect in the right and left monitor. I don't know of any way to adjust zoom in one or two monitors as TH2G makes a "single" monitor appear to the OS. Adjusting zoom for one monitor adjusts zoom for all 3. Anyone know of a way around this? Thanks.