Race Pace Mystery Solved!

Turns out my computer was not calibrated to my tires.  Rookie mistake.  I thought I had initially fixed the problem by moving the transmitter on my spoke but no, it was definitely the calibration after I READ THE MANUAL!! who knew those would be helpful.  Well sorry for all of the commotion, but hey it was exciting.  I just completed my first ride under new calibration with a time of 57:50 and a distance of 16.7.  Now I pose a new question, my tri is only 12 days away, should I be O.K. in completing it?  My swimming and run logs are accurate in my training log, I know that for sure, if you need to reference.  Thanks again guys.