Yes, we must get to the bottom of this.
I see it in your post history as being posted at 4:44 AM (I'm on Mountain Time), but I just checked and it's not in the deleted posts forum.
This is weird.
This has happened before. That it was visible in the personal posthistory, and in the last posts thingy, but gone from the threads.
Don't know what the solution was then. Will have a look if I can find posts about it.