Hello. Looking at my back-end mail queue, it looks like a new follower is generating 2 duplicate emails to tell the person who is being followed that they have a new follower.

(If you need to check my mail q to see these, look at Nov 4th 16:02 where you'll see 2... and also Nov 4th 15:54 another 2)

Also the email subject title looks like "You have new followers" - given that I assume each email is only notifying the person about 1 new follower, can that get retitled in your next update to "You have a new follower"