Hi guys
Let me assure you that everything is calculated correctly here.
The situation is a little weird, it is not perfectly optimal for just push/fold strategy because our stacks are bigger than 15BB, but we got a bubble, and the calling ranges are ridiculous.
There is a button which explains everything what went into calculation the EV, it is located below the grid, on the screenshot we have A6o selected, so it reads
A6o detailed result. You can check any hand that interests you to see how the EV got calculated and why in this case having 99 is less nice than having 88.
There are many surprising situations, I've recorded a vid where I answer a similar question, where someone believed that 99 being worse than 77 must have been a bug, but it wasnt:
https://youtu.be/kzYl3z8rMlw There I demonstrate how to use this detailed result button to explain the seemingly unexpected result.