After installing Xposed and GravityBox for KK, I tried using the notification drawer color fill option to see if that would correct or override it, but that completely filled the drawer, hiding everything in it. I could still click buttons, but could not see them. So I reversed that, but still have the gap in the bar. Edit: Seems I had to choose "underlay" as an option for the color fill, so it's unrelated/not an issue as far as that goes.
It seems like a minor thing, but given how the color fill reacted in addition to now having this gap, I'm worried that there may be other issues I could run into. Does anyone have any ideas or suggestions on how I could fix this, hopefully without reinstalling the OS?
Edit: Attached another screenshot better illustrating what's happening.