I don't know where you heard that 12:00 was standard, but...
It isn't. The TS as a conceptual circuit is beautiful and amazing, but in modern practice with 10-20% tolerance components it's a bloody mess. You can't expect anything to be standard. The way all of the mass-produced pedals are, Andy's 9-11-12 settings can mean about as much as 'a titch of gain, a helping of tone, and a handful of volume' in practice. My current TS has unity around noon, but before I modded it to 808 specs it was lower, and when I'm using a different diode pair and a different tone stack it's 9... these circuits just don't like consistency. There's also the fact that the TS isn't a 'boost' like an LPB-1 but a 'juicer' like steroids for your signal. Finally, the way the potentiometers are made, some pedals will have an even and clean ascent up the numbers, and we call these pedals fucking magical. Normally there will be a very bizarre path from no signal to full blast, and you can have plateaus followed by sheer cliffs all the way across the range of the potentiometer. Don't worry, this is normal.
(For more TS info, use the search button or PM me. Thanks for posting, though, as I'm currently using a TS FAQ as my excuse for not studying for tomorrow's physics exam and this isn't an unusual question.)
And for future reference, if you have a problem with volume being too low and you have a volume control that can be turned up, the knob won't bite. I promise. And if it does... well, bloody hell, bite back - if you have a surrealist stompbox that attacks things at random and refuses to obey shaky logic, you're going to have to discipline it.
Jeff