FUP has been reset in the middle of the month

I'm on 1091 plan which has a 60 GB FUP @ 8 Mbps speed, post that 512 kbps UL. Today my FUP has been reset to 60 GB, anyone else seeing this change in their account? Btw, I'm from chennai





* I have already leeched 25GB+ this month, this wierd thing happend after that