Question about exp bar
 

My exp bar has 4 bars on it, Adventure, AA, Tradeskill and PVP. I don't understand the point of the PVP exp bar, it always seems to mirror my adventure exp bar but a different color. I checked the variants to see if I was maybe missing an option, but I don't see anything there. Is there a way to either get rid of the PVP bar, or change it to guild exp (or both)?

The bars are re-arrangeable. Simply resize the window vertically to "hide" the bottom most bar.
I think the PVP bar is already at the bottom, but you can click the right-side gems to re-order them.

Lastly, the PVP bar is for Infamy on PVP servers.

Is there a way I could change it to guild exp, since I don't play on a PVP server? My alt guild is still miles from cap so having that up there would be nice.

Not without editing several data fields in the file.