Bi-week playoff matchups?

[rajncajn]

My local switched from Yahoo to ESPN this year and we had a new guy running the league. Since none of us have used ESPN before, none of us noticed until we didn't advance in the brackets that the playoffs were set up as a 2 week cumulation match-up. So, week 15 & 16, teams A/B & C/D play each other and each teams combined scores for those two weeks advance you to the championships which run weeks 17 & 18. This is the first time I'd ever seen it done this way & was wondering if anyone else runs their playoffs this way and what opinions are on it. In our case, we just left it set up that way and just looked at the scores. I'm somewhat intrigued at the idea of not allowing one ill-timed bad week determine your fantasy season.