Tickets being appended to / merged with other tickets

Tickets being appended to / merged with other tickets

Hi there,
 
We "HAD" SDP build 9024.
 
We upgraded to 9049 because we had a problem viewing the automatic replies window.
 
After doing the upgrade, a strange problem began occurring.
 
Tickets would suddenly get merged with other tickets.
 
I decided to do all the updates and now we are on 9204.
 
To preface the problem, tickets are created when we receive an email at our customer support email address.
 
Example:
 
Ticket 12597 belonged to a requester named Nick and was created on March 11.
 
Today at 12:36, we received a spam email 24224739.1743843.760031203@e2ma.net to our customer support email.
 
It created a ticket 12828 and merged with 12597 and looks like this:
 
 
What could be causing this?
 
Thanks,
 
David

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