Custom attributes in web service having odd behaviour

Question

I have created two custom attributes one for validating a soap request and authorization. Each having its own seperate class to overide processMessage

For a reason unclear to me, when i assign a method with my authorization attribute it inisits on entering my validationExtension class.

I understand that from the MDSN:

"Initialize is called every time a SOAP request is made to an XML Web service method"

Does this mean that every class I have that inherits SoapExtension, that its initialize will invoke itself as that seems to be what is happening.

Hope this is clear enough for any help