check your rear derailleur and its alignment across the rear cassette, both vert and horiz. also, is it a shimano cassette?
other than that, as above, the lever should stay put in all positions, and this could be where the limitations of using a device designed for 7 gears is becoming evident.
check your rear derailleur and its alignment across the rear cassette, both vert and horiz. also, is it a shimano cassette?
other than that, as above, the lever should stay put in all positions, and this could be where the limitations of using a device designed for 7 gears is becoming evident.