Fullscreen resolution

[Ridesdragons]

So my current monitor has a resolution of 1280x1024. that's all fine and dandy, but I've never really liked the squarish look of the screen, and in some games, it really breaks the game (things like minecraft can't be played on that resolution at all, since you can't see half of the screen). I've changed my display resolution (right-clicking the desktop, clicking "screen resolution", and changing it to something else) to 1280x768, which is closer to widescreen, and I've kept it as such since. However, it seems some games don't like that. Some games will maintain the 1280x768 resolution IF I change the options in the game to set the game resolution to 1280x768, and if it's anything else, the screen will automatically stretch to 1280x1024, which is fine, because I wouldn't want the resolution to be anything else on a x768 screen anyway. games like Don't Starve do this, which means I can maintain my x768 screen while playing in full screen mode. However, in civ, even though I have the resolution set to x768, it refuses to keep that screen size, and stretches to x1024 automatically. It's annoying for several reasons. aside from the fact that I don't really like the 5:4 screen, any time I alt+tab the screen has to completely refresh and re-stretch everything back to x768, and when I go back it does the same thing, only changing it back to x1024. It's more of an annoyance than anything game-breaking, but it's still really annoying. I've searched and searched, and couldn't find anyone who mentioned changing full screen to something other than native resolution, so I decided I'd make a post asking if this can be fixed. Civ V is one of the only games I have that do this, so I'm wondering if this can be fixed at all, or if I have to deal with it.

essentially I changed my default screen resolution to something other than native so that it's a widescreen, and while most of my games seem to conform to this, Civ V refuses to accept the new resolution. can I fix this?