Spam Report Numbers not adding up

Hello all,

I have been asked to start submitting monthly spam reports for the executive team to peruse. We are using Symantec Mail Security for Microsoft Exchange (or SMSMSMSMSMSME) version 6.5

The reports run fine and the .pdf format is very handy but there seems to be a math issue as the spam violations do not add up to the numbers in the spam catagories. Eg

Spam Violations:                18060

Spam:                               17137

suspected spam                    149

suspected spam and SCL          0

This leaves a hole of 774 emails that are spam violations but not covered in the spam catagories. Normally i wouldn't care but the company are a bunch of accountants and as such have a fanatical approach to balancing everything.

Does anyone know where my missing spam is hiding?