Minor annoyance

For some reason, whenever I get mail, I get two notices in Notification Center. One right after the other.
I've checked the preferences in Notification Center and in Mail. Nothing to suggest a problem.
Any suggestions?

Have seen reports of double and triple notices from mail.

Open Sys Pref - Notifications

Try dragging Mail to the Not in Notifications section - have to scroll down to see it - and it can be a pitr, especially if nothing is in that area - took me 2 or 3 trys to get it there.
Close out, reboot, then add it back in.

Ok, just did that. Now to see if it works...
Thanks.

Well, that didn't work. Any more suggestions?

EDIT: Ok, here's a thought. In Activity Monitor, I have 2 instances of 'Mail Web Content' running. I checked the wife's computer and she only has one (same system, same iMac).
Wonder what could be causing this? What starts this anyway, anyone know?

Edit 2: Ok when I disable my 2 pop accounts (leaving Gmail) it doesn't do it. When I put them back I get 2 notifications again. Weird.

Ok, if anyone is reading this and has the same problem, I fixed it.
The answer is here: Seeing double with Mail VIP notifications | Macworld
Simple fix. Who knew?

Thanks for posting that, it will definitely help others.