Just a thought from a complete JavaScript ignoramus.
Could this just be happening to you, testing with multiple logins?
As JavaScript is locally actioned, I would have thought that reading the post count on your machine could not affect a post count read on another user's machine half a planet away - but I can imagine that JavaScript's loose typing might be confused if two users on the same machine were playing with the same variables at the same time.
In other words, for normal one login per machine users, there will not be a problem.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.