wxup,
Mine was the same way. Trims centered, hovered great. No issues other than when I gave forward input the heli drifted left. My swashplate looked level too. I landed the heli trimmed the aileron right to counter the left drift and that did it. Still hovered great and straight as an arrow in forward flight.

My first thought was that if I trim the aileron right it would cause the heli to hover right. This wasn't the case. I think that the little amount of trim was just enough to "level" the swashplate. By eye it still looks like it is in the same position.