Something about numbers...

A PM thread was closed by @System after reaching 500 replies.

That would normally be fine, receipt there’s an issue with the math invoiced.

According to the automatic lock:

This message was automatically closed after reaching the maximum limit of 500 replies.

There are currently 501 posts in that thread.

Post 501 is the system message, while post 1 is the original post.

The first post is not a reply, so move all the numbers back.

So then the thread was closed after 499 replies.

What gives?!?

Someone probably deleted their own post.