I have a 9 speed Ultegra system and I have a question about adjusting the rear derailer. Basically, when my shift lever is as low as possible (meaning it should be in the hardest gear, smallest sprocket) im only in the 5th or 6th gear. When my shift lever is in the highest possible position (meaning it should be in the highest gear, easiest sprocket) I feel like the derailer is way into my spokes (meaning it thinks there should be more gears up there.) My question is, is this a matter of cable tension or something else and how should I go about fixing it. Thanks a lot.