Huh, that's weird. I didn't even think it was possible with the Binaries. Mine are always even top and bottom even after I screwed with it to try and make them uneven by twisting the cables differently (just messing with the new binaries to see what I could do with them.) Try drawing and letting down a couple times and see if they stay that way or if they shift. Is your tiller the same or do you have one limb loaded more than the other?