ummm, I don't really know about the problem, but what I've seen the strange timer runnings was the Windows Timer... That thing has 64FPS, 32FPS, etc. Maybe there's a Windows Timer running there instead of a DXTimer somehow?

Oh, yea, and vSync would only try to cap the FPS at standard vSync values, like 60, 70, 75, 85, 100, 120, 160. Don't think the "monitor" could interfere with the FPS in any diff way