Threads Unsubscribing

This is my second day as DP member and though I didn't check the option to subscribe any thread my CP is plagued with an update of absolutely all the threads I participate in or I simply read on.

Having those in which I participated can be useful but having all those what I read not at all, how can I fix it?

The CP seems not obeying the unsubscribing thingy :O


P.S. one hour after posting this, I'm trying to delete manually those threads from my subscription list but they don't go either :'(

I was told it's a vBulletin bug but hope someone can tell me how to unsubscribe.