I put the doc Humphreys belt tensioner on today, I ran bike a little with the back wheel up + the belt ran over the left edge of the sprocket a little I put the wheel down + rolled the bike in the driveway + it went back to the edge + stayed there. When I backed up, it went all the way right. I'm waiting for my kriket to recheck tension . I didn't think the tensioner would change it that much. Any suggestions?