I am after some advice

I have a licenced home edition, and I constantly get the 'Possible malicious URL or Cookie' error every time I visit Ebay, on every page.

I have told it to allow the URL and remember forever, still no change. I have tried all combinations of allow through the message but still no change.

How do I fix this?

As an aside, I also have N360 running as AV, primarily using Spybot for malware. Is this an issue?