I didn't really pay attention to your original post as much as I should have back when this thread was created.

If you have a different GPU powering each monitor, then you really need to have each monitor have it's own reset region. The Reset region will, other than set the game resolution, will also determine which GPU will render the game. So if you have set region 1 as the Reset region for swap group 2, then pretty much everything will render on that GPU.

so, if you still want to go down that path of having all the game render at the same resolution as Region 1, you need to duplicate region 1, move that over to the same monitor as swap group to, poke that region into swap group two as well, and set it to be the reset region for swap group two. Basically an unused region, except to determine resolution, and were putting it in swap group 2 to make sure swap group 1 doesn't get funny idea's about swapping.

Effectively, Option 2 in my original post.