How many times does f-secure scan messages?

[Michael Freeman]

We are seeing double and even tripple virus content information within the
body of some of our messages.

 Sender:
IP Address: 212.118.13.90
 Recipient: bob at domain.com
   Subject:  Undelivered Mail Returned to Sender
 MessageID: 1B1GLG-0003FQ-Hv
    Report: F-Secure: ./1B1GLG-0003FQ-Hv/document.pif: Infected:
W32/Mydoom.A at mm [Orion]
            F-Secure: ./1B1GLG-0003FQ-Hv/document.pif: Infected: I-
Worm.Mydoom.a [AVP]
            MailScanner: Shortcuts to MS-Dos programs are very dangerous in
email (document.pif)
            No programs allowed (document.pif)
    Report: F-Secure: [./1B1GLG-0003FQ-Hv/document.zip] document.pif:
Infected: W32/Mydoom.A at mm [Orion]
            F-Secure: [./1B1GLG-0003FQ-Hv/document.zip] document.pif:
Infected: I-Worm.Mydoom.a [AVP]
            F-Secure: ./1B1GLG-0003FQ-Hv/document.pif: Infected:
W32/Mydoom.A at mm [Orion]
            F-Secure: ./1B1GLG-0003FQ-Hv/document.pif: Infected: I-
Worm.Mydoom.a [AVP]
            MailScanner: Shortcuts to MS-Dos programs are very dangerous in
email (document.pif)
            No programs allowed (document.pif)

Full headers are:

Is there a way to fix this issue?