[otrs] Routing of email to the queues

Hello everyone, I have a problem with the routing of emails inside OTRS. We have 2 queues, each with a different email address assigned (ex. site1@example.com->queue1 and site2@example.com->queue2) Everything works fine if the users send the email to either one of the queues. The problem presents itself when an email is sent to both queues (particularly with both queues' addresses in the TO: field). At that point OTRS will create 2 identical tickets, and they will both end up in the same queue (which one of the two is random). Obviously we would like to have each ticket end up in each queue separately. Is this a bug? A feature? Has anybody else run into this issue? Thanks, Giordano Bianchi