One thing it could be is something called ‘reprojection’. The Oculus version is called ‘Asynchronous Space Warp’ (ASW) and it kicks in when the framerate of the game/sim can’t keep up with the headset.
The headset of the Rift S uses a 80 Hz (e.g. 80 frames a second) update rate. If DCS can’t reach that (which is pretty common) then it tells the sim to go to half of it e.g. 40 fps, and then on the Oculus driver side of things it ‘fills in’ what it thinks happens. It uses your head movements to make a guess on what that missing frame will look like (i.e. shift it a bit right if you’re moving your head to the left etc).
Reprojection or ASW in the Oculus world, is essentially letting DCS run at 40 frames per second but you get to see 80 fps in the headset.
The reason for the double vision on things further away is sometimes because ASW is guessing where something should be, but gets it wrong, meaning your alternated frames shows two things a little off in quick succession.
For DCS in VR on a 1070 you need to hit the ‘VR’ settings button, turn off MSAA, put shadows flat and start from there. Try using settings like this.
Hopefully this means you get less reprojection / double things showing up as the games is providing more frames per second on time to the headset.