BL2 VR only running at half selected framerate (Index)

I was wondering why this game only runs at 72 frames for me, and after trying out the different framerates you can select on the Index, I noticed that the game will always run at half of what I selected.

144 selected = runs at 72 fps
120 = 60
90 = 45
80 = 40

What the hell is up with that? Is there a way to fix this? Maybe something in the .ini files?