I've had a couple of email notiiications of posts on threads I'm following but they don't appear here on the forum.They seem harmless but I have to assume they must have fallen foul of some rule. But I'm still curious.
PM me a screenshot of the notifications and I'll look into it, what happens more often is threads get moved to a more appropriate topic or they get merged into other threads if they're duplicates or they get renamed if the thread was for instance titled "Help please?" which has been used about 300 times before we might rename it to "Help with Universal Geneve Polerouter on eBay" which makes it more specific and easier to find.