How many ARCH were staked when they shouldn't have due to the bug you had to fix? You forgot to mention that part...
Don't quote me on this. But I think how the bug worked is that is took stakes from others. So the entire chain didn't generate more stakes then it should. On average there are about 1 ARCH per PoS block. When you took the average before and after the issue was reported it was still 1 ARCH per block.