I messed with it tonight and mine is the same way. One tooth and it's at the stop for retarded and the next tooth it's at the stop for advanced. The "advanced tooth" allows me to set it to 5 degrees with the vacuum attached. The "retarded tooth" allows me to set it to the farthest left mark. I assume the second mark is actually 12 degrees but I can't seem to find any documentation stating what degrees those two left marks are on the 22r. If the far left one is 12 degrees I guess I'm fine. However, if I pull the vacuum it's at 5 degrees which, the best I can tell, is the setting for the 22re and the 22r should be 0.