Frame sagging?

So I was messing with the dart the other day, and noticed when I tried to close my passenger door, the glass was overlapping the rear glass by about an inch at the top...so if i slammed the door, i woulda shattered glass.

As far as I know this car was not wrecked, didn't notice this before I was working on my front (removed k, rebuild supension)..

Could I have bent the frame some how? I jacked it up and supported it on the front frame rails, didn't do that wrong.

Any ideas?
And what you think it would cost to take to frame shop, straighten it and then put in subframe connectors? Also, i am gonna be getting a frontend kit from HemiDenny....maybe I should wait till this is installed, before taking it to a shop. Don't want it being aligned to an old K member, when im junking that setup.

Thanks in advance.