Assistance with Wahoo Kickr

i tried all settings and i do want 100%. my trainer behaves the same on all settings. seems like calibration the speed is based off of the flywheel, but playing zwift the speed is based off of cadence and watt. To me it makes most sense to base speed off the flywheel.

can anyone else verify how their kickr behaves?

does your flywheel continue spinning after you have 0 watts and your character stops?

does your flywheel stop quickly up gradient after a high watt kick and your character still moves?

Do most people switch to instantaneous readings instead of 3 sec avg?

Do you turn off erg smoothing? is that strictly a feature used during erg?