Two assign messages when you assign records

Hi,

I have a customer that want to have emails sent every time you get a record assigned to you by someone else which I figured I would solve with a plugin on assign message.
Now, when I tested this I was working on a CRM 2013 6.1.3 which behaved like I expected and gave me a message when I assign a record, however the customer is on 6.1.2 and when I run the code there two assign messages are given when I assign a record. I have tested this on a 6.1.1 too and there's the same issue with two assign messages for each assign.

I can't find anything about this in the release notes for 6.1.3, has anyone seen anything similar?

Thanks!

Rickard Norström Developer CRM-Konsulterna
http://www.crmkonsulterna.se
Swedish Dynamics CRM Forum: http://www.crmforum.se
My Blog: http://rickardnorstrom.blogspot.se