I received staged ratings starting in 2003 effective date January 1st. @60 percent disabled PTSDPTS 100% rating from August 8th to December 1st 2003. A 70% from February 25th 2004 to February 25th 2016. A 100% from Nov. 14th 2019 to March 1st. 90% there after, which I was awarded PT IUD prior to the Board's grant, in 2016. Paid 90% granted permanent total. I received a retroactive pay of only 1,111$ period. I must note that I was being paid a pension up until 2016. A 30% grant was given on 2010 November. The board increased it by 30% April 28th, 2020. My question is why so little back pay.Also granted House Bound for 4 months