I don't know why your AntMiner software would display that amount of "found blocks" for PPC mining, but it must be incorrect. The last block of PPC that was found on ipoMiner was on June 4. Beyond that, there is no plausible scenario where you could find 21 blocks of PPC in 2 days at 13.5TH/s. Mathematically, you are expected to find 1 block in ~5.5 days of mining PPC at current PPC difficulty. Further, the "best share" values shown in your screenshots are ~22M and ~79M, while block difficulty for PPC is ~1.5B.. so it is impossible to have solved a block with the highest share value you have submitted.