Step 2) Bidding process begins. All players privately choose two numbers between 1 and 20 and PM/mail them to me. The first number determines how soon you choose your role, the second is the tiebreaker. The lower your number chosen the sooner you choose your role, but single picks will always beat out double picks. This sound confusing, so I'm going to give an example of how it works. Let's take five people, and have them choose their numbers:
Player A) 2 / 10
Player B) 2 / 6
Player C) 4 / 1
Player D) 19 / 8
Player E) 10 / 1
With those results, the order of choosing roles falls as such:
Player C (since he has the lowest number that isn't duplicated)
Player E
Player D (just moving down the list)
Player B (Now into doubles, tie breaker number is the lowest)
Player A
Basically, to summarize: Pick the lowest number you can that you think nobody else will choose. Of course, there's also advantages to choosing later, as perhaps maybe mafia won't target you if they think you're a vanilla...