This is slightly embarassing cause I'm a mechanic....
I stayed at the shop after we closed to build my Pedal Force RS2. I had trouble when it came to tuning the shifting. Well, I had only ridden Sram double tap, never set one up, none of the bikes we carry ever come with it stock...
I have red shifters and force derailleurs. The shifter felt a lot harder to move than I remember. Part of the problem I was having with tuning them may have to do with having only ridden Force for a short while ( test riding a repair bike).
So I go to set up the derailleurs like always. Once I start downshifting (10th to 1st), it doesnt do what I expect it to. I can get it to shift 10 to 9, then I try to go 9 to 8 and it shifts halfway up the cassette. I could not get it to shift just one at a time. Starting at 1st gear going to 10, it did the same thing. The cable is fine, I even took the tape and bar tape off.