That is because one comes from Afternic to let you know you can list the names i.e. they meet our requirements, TLD, price, etc. However, they also have to be able to transfer so we go to your registrar and tell them you want to opt in to the network, they decide if you can i.e. your name can transfer there are no locks on it, etc. Once they determine it is they send the second email asking you to confirm that you are ok with transferring the domain name if it sells.
So most likely your domain cannot transfer because there is a lock or something preventing it. If not ask your registrar if they sent you the final email and follow up with
[email protected].