this is odd. i assume you have tried re calibrating again. i think i asked this before but i'll go again...you've only had this since january. have you reached out to whoever you got this from or from the trainer company? you should before your warranty expires. especially since it appears that a calibration may have somehow hosed things up. possibly the data beign stored is beign stored in flash that is not quite working and the data beign retrieved is just wrong. pure guessing on my part.