I always wondered why Alpha India Group publish their (excellent) AI Flight Plans one step back. Now when the season is Summer 2014 they publish Winter 2013/14. It was always like that! Is it their policy or something else. Does anybody know?

If I had to guess, it's probably because the schedules are subject to change, so if you tried to use the current schedule, it might not necessarily be accurate, whereas the past schedule isn't going to change since it already happened.

It means that their FP will never be current. I asking this becouse all my AI traffic is custom made (mostly from AIG and UTT Flight plans - 50/50). Some airlines increase their routes number on summer (decrease on winter). I think it is more important that there is a new flight from A to B than eg. is departure time is 14:00 or 15:10.