I have an EVH USA guitar. Issue....sound still comes from amp when volume pot on guitar is at 0. Additionally, sound is cutting on and off with volume pot at 10. Could this be a guitar issue or amp issue?
It's volume pot for potentiometer, not volume pod, and it is probably a bad pot. You could try spraying some switch-cleaning fluid into the pot to see if that helps; failing that, replace the pot.
If you aren't comfortable opening up the guitar to work on it, take it to a good tech. If the guitar is newish, take it back to the store where you bought it to see if they will rectify the issue (possibly without charge).
I could also be that the pot is loose and turns in the guitar body so that the wires are getting crossed and shorting out. With any guitar that you own, if you start to notice that a volume or tone knob does not stop hard at either end of its range, you should inspect the locking nut to make sure it is tightly secure.
For sure it is a bad potentiometer. It is a ring type potentiometer that has its limiter shifted towards max (possibly forced past max). Thus the knob stops before it reaches zero and gets past max. It must be replaced. You could repair the potentiometer by disassembly, but the chances are most likely you won't be able to fix it. Better have it replaced.