I think a week to vote for 16 matchups in Round 2 is sufficient. There are really two ways to handle your second question, how to determine who is included if multiple teams are tied for 32nd place with equal votes.
The first to randomly select teams.
The second is to include tied teams in 3 band brackets in Round 2.
I'm more inclined to randomly select teams since that's easier, but if enough people want to have 3 band brackets, then I will do that instead.
Incidentally, a similar situation will arise if, in any given bracket, both teams are tied. In this situation, I definitely think that both bands should progress to the next round for a three team (or possibly four team -- if both brackets end up tied) round. Where there is a three team bracket, I envision each voter casting one vote for each of the three teams.
Thoughts?
EDIT: With regard to the wiki page getting confusing, I'm not anticipating any problems. The scoreboard will be at the top, and Round 2 would look like this:
BATTLE #1
[1st Seed] vs. [Random]
Voting for [1st Seed]:
Voting for [Random]:
BATTLE #2
[15th Seed] vs. [Random]
Voting for [15th Seed]:
Voting for [Random]:
etc.
Each Battle will be a section heading, so hyperlinks to each battle will be available at the top of the wiki page.
EDIT2: I'm going to pull random numbers off the
www.random.org generator to determine matchups and which teams are included in the case of a tie for the bottom rungs. I'll provide screenshots of the random number generation on request to keep the process transparent.