Not sure im following you. FSO has always had 2 weeks between setups. At least as far as I recall.
Just for 2011 with the one FSO per month. Prior, it was 3 weeks on and 1 week off except for holiday interruptions.
Your first response answers your second response.
I think the schedule was changed to make it more predictable and "logical". FSO (barring holidays, etc.) has been easier to figure out since it's always the first three weeks of each calendar month. Having the FSO "month" spanning two calendar months was very confusing to many, and many were always saying "is this frame 1 or 2?". I think it would have also led to issues where orders didn't come out until last minute because "I'm CiC for frame 1...is that next week or this week?".
So in my opinion, it should remain the first three weeks of the calendar month even if it means two off weeks in a row sometimes.
Many times the 3 weeks on and 1 week off meant Frame 1 was in last week of the month and Frames 2 and 3 were in first weeks of the following month. Plus other unique combinations.
If one FSO per month makes it easier on logistical planning, then that's OK with me. Just asking what was in store for the new year.