#1
So when i play notes on the 9-13 fretboards it makes a wierd noise, what i figured out was that the strings were hitting either the 13th or the 14th fret and causing the noise. So what can i do to fix it?
#2
go get the truss rod adjusted... it should only cost a couple bux if anything.

also if yuour bridge has lifts u can mess with those but that can offset your action.

truss rod is your best bet