When i play an open B, my low E string rings out. its quite annoying. maybe its a setup problem? or is it normal?
It's probably a technique thing, but it's definitely not normal. Try using your palm to mute the strings above the B. Not heavy like a palm mute, just sort of rest it on the strings enough to stop them from ringing.
its normal its called sympathetic vibration or something like that its the string vibrating from the frequency of the open b just mute it when you strum