I went to my host and they said it's a Xenforo issue, I have noticed that over the past couple of days at different times the forum would revert back a couple of days. Other times it's fine. Has anyone had this issue?
I personally have theories as to why it is happening. But I don't know for sure. I do know other people have been experiencing this (regardless of the software development they were using).
My theory is that they're trying to implement some sort of true cloud network. Of course that's one theory. Because I first ran across this when trying to upgrade someone's site.
It upgraded, then suddenly everything was reverted. But oddly, sometimes when I revisited the site, it was back to the way I had it (completely upgraded). Then I would visit it again & found it reverted. I had to keep applying it over and over, before it took.
It was a weird "doctor Jekyll and Mr Hyde" type thing.
But never the less you're not alone and it's not XenForo or the software you are using.