Oh ok great, I kinda figured it had to be some source I couldn't access!  I don't think I've changed or removed any since I wanted to ask first - except maybe one that was partially in a shopping center parking lot that I use a lot where I did a bunch of reorganizing?

Also while I was poking around into this wild world of OSM alleyways I did find that I think these alley numbers should be listed as reference codes with the tag ref= (i.e. ref=80875) instead of as name=.  I'm looking at the last bullet point at the end of the "Values" section on this page: https://wiki.openstreetmap.org/wiki/Key:name#Values .

I think the reasoning here is that when the alley has a name= tag, it appears in most renderings of the map and causes a lot of clutter and confusion.  It seems some renderings know to prioritize displaying street names over alley names, but at least one I use does not so sometimes you have to zoom in further to get a street name than you do to get a neighboring alley name.  That's actually how I realized all the alley names were relatively new.  All of this explanation is to say: I can see you've put a ton of work into this so I don't want you to think I'm just here to be whiny and pedantic!

That said, I do think these should be tagged ref= (or perhaps loc_ref= ? see https://wiki.openstreetmap.org/wiki/Key:ref ).  If you agree, I'm happy to help out in changing the tags in my area when I get the chance, and in the future whenever I encounter them!

Let me know what you think, and thanks for all your work - who better to have as a mapper than a location scout????

-Ray