The reason "1s subtract" is an option is because sometimes it comes up.  For example, there are a type of vampire called Nosferatu which are cursed with (basically) hideousness.  They don't get to reroll 10s and have to subtract 1s from successes for any social roll other than intimidation.  I think there's also a spell that mages can put on someone which makes them have to do the same thing for any roll.<br/><br/>I think the confusion arose from how in the old World of Darkness, 1s always subtracted, but the target number wasn't always 8.  Nevertheless, I think things are handled now.