wherever did you find that pic? you must have been looking waaaaaay back in the archives!!
mmmmmmm red valvesprings...wish i could get a clear rocker cover so i could see them more often
i think that advancing the cam one tooth would make the mark line up with the top of the head exactly, which could make a difference...thats a fair few degrees out of wack.
obviously though before you advance the cam make sure the crank is at TDC, if your balancer has slipped then you could be causing yourself big dramas re: valves and pistons getting togather.