I have the same error problems and even more. I have thousands of followers and I do have new followers on regular basis even today. Yet it said 7 new followers last year.
Facts checked recorded only 3 for me which is not accurate.
I have updated my new location 4 months ago,but the Email today has me as a Top 10% of contributors in the region I left 4 months ago. So I donβt know really.
The monthly reports are always full of errors really. Congratulations anyway huge figures you have.