I think usually when we post about something significant we do it as “admin”. But the way the web site is set up if we go into the admin functions that we do daily we become logged in automatically on the forum as admin, even if we were previously logged in under our names. If we forget to log back out and then log in under our names it looks like a post by admin when we really wanted it to be a post with our name. We have both screwed up that way.
But the bottom line is when the post is an admin announcement we try to remember to post as that, but if it is just normal posts on the forum we try to remember to use our names.
If that sounds confusing it is because it is.