Grouping (Grouped by) repeating group unique IDs

Hi, I hope I make sense here…

I’m trying to figure out how to allow users to edit the Things associated with a Grouping in the database (I’m using “grouped by” in a repeating group). However, the Grouping seems to completely remove all unique identifiers that trace back to the original data Things.

Here’s what I’m trying to do. I need to load a list of Things grouped by their unique attributes and aggregated by count, so that the user can edit the attributes on a single row (pertaining to multiple identical Things).