I'm having rear derailuer shifting problems on my KK Road machine, shifting upwards is slow and sloppy like its having a hard time getting into bigger cogs, I take the bike off the trainer and with the same trainer tire skewer casset..everything I put it on the road for quick test ride and it shifts flawless time and time again...put it back on trainer and the same thing sloppy up shifting, can't figure it out, anyone else run across this problem? I don't think I'm over tightening anything and the derailuer is exact same position as it is off the trainer no warping etc..!?!?? I'm puzzled