Okay, it's half fixed. The colors are right and in the AutoCAD window the thumbnails appear to be the same size, however, they look a bit different, mine save on the bottom with no "extra top space" (see pic) and in the Windows Explorer window, in the preview pane, most of them pull up to fit the window and the ones I saved come up as a tile in the middle that's much harder to see.
Is this an AutoCAD save setting or a Window Explorer Setting? I am guessing it's AutoCAD because only the drawings saved from my computer are doing this.
I'm more concerned about the size in explorer than the placement in AutoCAD.