Thanks for the post - I hope the following response helps:
1. This has been logged as a bug with Esri Support and the Collector team reported it as expected behavior. Though the fields are present in the layer, they will only be populated when a point is explicitly collected: BUG-000112820: The GPS metadata fields do not populate a feature la..
2. I tested this several times and am not able to reproduce the issue; if you are still seeing this I would recommend getting a case created with Esri Support.