When setting the height of the FD relative to large chainring teeth, 1-2mm (as stated in the setup guide) the chain rubs agains the tab that is part of the outter cage and makes a right angle turn across the top of the chain. I have to set the outter cage around 5mm to clear this tab. Am I doing something wrong? FD shifts fine, just cannot set to SRAM spec of 1-2mm.