The Mystery Of Disappearing WordPress Followers

Over the past 12 months or so I have noticed something peculiar about WordPress. Today I received a notification that my blog, newauthoronline.com has a new follower. I am, of course always delighted to welcome new readers. However the latest recruit turned out to be someone who has been following this site for some considerable time. I know this as the blogger in question has liked and commented on my posts and I distinctly recollect receiving a previous notification of them following.

Today...