Pretty sure you can't change it on yahoo after the season has started (nor should you be able to, especially if your team will be one that sneaks in the 7 or 8 spot). Realisticly, I don't think you should have more than 6 making the playoffs in a 12 team league as it leaves too much to the final weeks of the schedule and allows half the league to make the playoffs at 6 already. In the NFL, you only get 12 of the 32 teams making the playoffs. Personally, I would have either 4 or maybe 6 make the playoffs (6 if you have divisions) in a 12 team league but I don't think more than half the league should make the playoffs - should the regular season really count for that little that only a third of the teams are eliminated by the end of regular season as opposed to the 60%+ that are eliminated following NFL regular season? The playoffs should be hard to make, not hard to miss.