I have a little problem with my SLX rear mech which drives me nuts now- it has been 2 days now and I tried everything...
It's been set up following Shimano's instructions- limit screws are fine, B limiter is fine... We are talking about 9sp system here: New cables New outers New cassette New freehub New shifters (SLX) New 9sp chain Hanger straight Barrel adjusted Front mech 9sp compatible
And it sill doesn't shift properly- it needs 2 clicks on couple of low gears (3rd and 4th most of the time)...
It also doesn't shift through all the range- only goes through 7 speeds (1-7 or 3-9)
When the mech was sold to me it was taken off another bike (used but not abused)- do you think it might be a problem with a mech?
I had the same problem with a new mech , they sold me a 10 speed instead of a 9, drove me mad trying to set it up, sounds as though you might have the same problem