Have you checked to ensure these arent actually guest postings?

No, one of them is mine, another two are admin posts.

The Email wrapper doesn't use the author of the content, it shows the Staff member who promoted the content. It looks like this data is not present in your table, so the email is showing it as a guest.

The fix will hide this if the member is not available.

Yea it's funny, I never ever promoted any content but theres 6 topics in Featured page.

Now it makes sense.... that's because we combined the "Featured" items and the "Promoted Content" from v4 into a single area.