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#1
2560x1600 is 16:10 and 1920x1080 is 16:9.
So when you set the non-recommended resolution, it is cutting that one unit of display height.
It is not an issue, apparently.
Thank you so much for that clarification, this is on a virtual monitor, so i need to plug in a native 1080p monitor so it changes back to 16:9 ?