Misclick, that's definitely rare but possible if the finger quickly pressed ALT+S instead of ALT+P.
I think I've also misclicked in the past but I immediately edited the post before it even reached 1-2 minutes. But if the date has changed, then I believe it is a reserve weekly posts.

We can help managers by reporting users for review mainly because of their habits. If it's about a campaign, let the manager decide what's best. In AndySt's case, I think the manager took the appropriate action.