Sounds like your
foot pod is already paired so no need to pair it again.
In case you need to pair it again the new foot
pods need to be turned upside down for pairing. Works like a charm.
As far as calibration I use known distance on my regular route which is exactly 1 mile and then use the calibration on the fly. I need to adjust the calibration for treadmill or run outside. I found the
foot pod to be fairly consistent for my foot strike regardless of the shoes I wear. Most of my shoes are light neutral trainers.