CSFBC's last post was 9 days ago. Why isn't this account tagged yet? If you tag the main account, and the accused creates a new account to look clean again, that's not good.
Why haven't you tagged it yet?
As far as I can see the red tags still stand as well as the flag supports. I imagine that nobody tagged this account because it came apparently to solve problems, and so we gave it the benefit of the doubt.
But you have a sound argument for tagging all of them, which I will rely on to keep a red tag even if all the problems that gave rise to the flag and the current red tags are eventually solved.
So, that you don't even leave a spiritually negative neutral tag on it seems too conservative to me.