incapacity to esa

Hi, I wonder if you can help I was on Incapacity Benefit and then transferred to Bereavement Benefit on the 1/1/11 until the 21/11/14. I was unaware that I transferred to ESA on 22/9/12 and I am now having to go through an appeal process after having been interviewed under caution for fraud as I had a pension which I thought was disregarded. It turns out it was disregarded but I had been put in the support group so this was taken into account. My question is as I was on BB until the 21/11/14 would I then have a year of contribution based ESA or would my BB benefit have cancelled this out.