I don't know why it shows different number. But there should be some difference between when PE runs at 07:05 and when you press Evaluate button.
As a troubleshooting, you can create these 3 tags.
Then you can compare which syntax contains problem. (Compare archived values and press evaluate button)
By the way why do you use "t+75m" for tagmax? Is there a possibilities that t+75m value is higher than 07:05 value?
Also PE is old technology, I like to use analysis instead of PE. it can do backfill/ recalculate.
Sorry, as it should be t+7h not t+75m.
We have max value at 1 or 2 mins past the 07:00 so can we use below logic?