The numbers 13 through 20 on the Anachronometer are reserved for being filled in by the Temporal Villain at a pace determined by their TVI. They are grouped in pairs of two and have one box not threatening paradox and one indeed threatening paradox.
Now, it says in the book: "the GM will periodically check off the lowest circle on this end of the Anachronometer".
So, if I – as GM – have checked off the first circle for "19-20", is the next circle I check off the first one in the line "17-18" or is it the second one for "19-20"?
The latter would mean, that already from the second TVI time step on, the temps would always risk paradox! While this would be hilarious, devastating fun for me, I think it might be a bit hard on the temps.
So, how is this supposed to work? Do you risk paradox after 2 or 5 TVI time steps?