I bought a Sram x.9 rear derailer and I put it on and it was working great, shifting like i wanted it to. But i bought a new x.9 front derailer and now my rear derailer is shifting like its a 10 speed, but i run a 9 speed cassette. What should i do? I dont know what i did to the derailer to make it start shifting differently, If i did anything. Edit: Should i have put this in the tech forum?