Treadmill speed/zwift speed discrepancy

Solved: used the calibration tool on the run pairing screen and perfect now!

Ran for the first time today using my zwift pod and my treadmill. To get a 10km speed on the zwift app I needed to run at 12km on the treadmill.

Is this normal or is either my treadmill crappy or is my run pod positioned incorrectly?

When I paired the ANT was showing an ! so not sure if that causes an issue?

Its likely my treadmill isn’t fantastic but thought I’d ask!