Again you concentrate only on the update part, explain this then:- he added only 2 new filter rules. The site in question has in total 6 or 7 rules. Thus atleast 4-5 rules were pre-existent. Even if I had that filter rule problem as you say, the locally cached filters in my machine should have shown the rest of the 4 or 5 filters relating to that site. But it didn't.