you might be correct here.....there is an error in my calculation...
In the calculation on 90 days past, I have deducted 90 days of 10 100% upvotes from the rewards pool, which puts the value as negative, but shown as 0 above. However I did not adjust for the 15% decrease in all other payouts as a result of the higher rshare on a daily basis. I am just trying to confirm this now and will make an update