Greetings my friend. I am one of the volunteers of btcmap.org and the trusted source to be able to make verified changes come from essentially the people who live in the places and visit the businesses. They fill out a verification form and we volunteers add, edit, update or remove the data from the map. 

You can find the verification information by accepting Bitcoin on github: 

https://github.com/teambtcmap/btcmap-data/issues/4833

About the deleted address and mail, I really don't remember deleting them, if I did it was an oversight of mine, I apologize for that, you can revert that data. 

Greetings,

Rockedf