** I thought I posted this before can't find it **
So I returned by Forerunner 620 to Garmin (as they requested) so they can send me a brand new unit, which hopefully will solve all the main problems.
My problem now is that I don't seem to be able to remove the Forerunner 620 from my iPhone 4s or iPad Air. I go to Devices then select "i" and click "Remove Device" (something like that), but the Forerunner 620 remains listed. I tried deleting the entire application then reinstalling it. The device remains. How do I remove the device from my iPhone so I don't see it again?