Getting hotmail in my inbox as email + text message

Hello there,
I only started having this issue recently, but after a couple of weeks it is really bugging me. My emais (yahoo, hotmail, gmail) are all integrated to show in my general inbox together with sms and bbm and facebook, etc.
everything has always been working fine, but for the last couple of weeks, I keep on receiving all my hotmail email double. One time received as actual email from my hotmail inbox, and one additional time as a message that has "received using: unknown: at the top of it. This message is useless, because you can't reply to it, you can actually only forward it as an email. The strange thing is that the "text" message appears immediately after the email was sent, but the actual hotmail email only comes much later.
My other email servers are working completely normal, so does anybody have any idea what I can do to stop this from happening?

thanks ever so much!!

Simple Solution, Backup, Wipe, Re-install OS

On other hand, Delete all email accounts, re-sync them, Do battery pull and then see. Also you must be looking in your 'Messages' Box thats where all Facebook, twitter, email, text, BBM etc go, you do have seperate SMS, Email inboxes, they will be in your menu somewhere, just have a look. ;)