Just had the same problem with a Sugino 75 crank with Track ZEN 49t chainring. My chainring was out of center with the crank. I loosened the chainring bolts, slowly snugged each one as I rotated the crank and then re-adjusted the chain tension and its perfectly symmetrical now. I didnt see any reason the chainring could be out of center since it fits the 14 bcd arms perfectly but just a fraction of a mm off throws the chainring out of center.