There was a mistake before the negative dividend.
Everybody got duplicate dividends of Jan16,2015.
2015-01-17 00:00:01 20150116 0.00405 mBTC/GHS
2015-01-19 01:59:48 2015116 0.00405 mBTC/GHS
The negative dividend is to fix this.And there is no dividends missing.
2015-01-19 02:16:53 20151161 -0.00405 mBTC/GHS
We are sorry for the misunderstanding.
Thank you.
AMHash Team.
Ok, I can see that in my posted screenshot above. Thanks for explaining.