As Jehad said, your indicators are not correct. You need to check their formulas !
The call success % (or rather, the call SETUP success %) should take into account the TCH overflow.
I’m very patient, don’t worry 🙂 So what you have to do is to get the technical doc from your vendor. Ask exactly what is the formula of each indicator.
After you get that, then only you can start working…
You can also try to experiment with your counters directly : make some formulas based on counters, calculate the result, and match it to an existing indicator (if the result is the same, it must mean the formula is the same…).
Good luck 🙂