Hi Boondocker and I am sorry you are having this continued trouble.
It does not seem logical that it is a software
issue at this end as no other users are complaining of this problem.
I also subscribe with no email notification and it is working fine for me.
I checked you profile in the vBulletin mod screen and you definitely have the correct selection.
I am pretty sure this setting does not reside on your PC as a cookie or I would ask you to clear your cookies and try again.
Maybe this needs to go to a techie.