It looks like you have future data and the wrong value in LATEST. the April screen seems to include May data,
- 900 + 400 = 1300
- 9000 + 500 = 9500
- 1000 + 2000 = 3000
But for the other one as you say 8900 + 9000 do not equal 27000. I'd look at later months in case some data has been wrongly loaded.