If a Feature has 2 Override Rules (Force Rule, followed by Experiment Rule), and a user falls under the Force Rule, doe it make sense that the

trackingCallback

does NOT fire for that user for that feature? Is that expected behavior

Correct, it will not fire

Got it, thanks Graham. So those users who are exposed to the Feature due to the Forced Rule are technically considered to be part of the Experiment?

no, they would not be