I'm just trying out the new user page, and sees something strange. There's one repository that I used just for fun, here:
which have 1 follower, myself. But on the user page, it is listed as 4 followers. The repo page itself list it as only 1 follower. I have attached the image from my user page too. Note that this is also true for another 3 repositories on my list (it has followers on user page, and just 1 on the repo page).
Hope this helps.