Inconsistent spamassassin scores in msg headers

[Michael Freeman]

Our Spam threshold is set to 5 before its considered spam and our high score is set at 7. Anothing above 7 is considered high scoring and deleted.

The issue is that high scoring spam is getting though to our clients and the score reported is absolutely incorrect. This msg was sitting in our mailqueue and is an example.

181  X-Spam-Status: Yes, hits=9.1 required=5.0 tests=BE_URI_RBL,HTML_20_30,
        HTML_MESSAGE,MIME_HTML_NO_CHARSET,MIME_HTML_ONLY,SARE_MILLIONSOF,
        SPAMCOP_URI_RBL autolearn=no version=2.63
024  X-Spam-Level: *********

Hits = 9.1 Required = 5.0 

If high scoring spam is set at 7 to delete how did this msg get though? Note what mailscanner is saying on the next line.

040  X-EfastServers-MailScanner-SpamScore: 3

-------------------------- MailScanner list ----------------------
To leave, send    leave mailscanner    to jiscmail at jiscmail.ac.uk
Before posting, please see the Most Asked Questions at
http://www.mailscanner.biz/maq/     and the archives at
http://www.jiscmail.ac.uk/lists/mailscanner.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mailscanner.info/pipermail/mailscanner/attachments/20040517/c17d219d/attachment.html