Well, how should I put this?
Basically, when we quote more than once in a single post, it seems like a notification for the second, third and so on quotes won't appear on the quoted user's notification
For example:
Ballin'.
'Kay.
In this case, only A get the notification (implying that he activates the notify quote option), but B do not.
And moreover, it seems like the notification only appear if I click the "quote" button in someone's post. Meaning, quoting someone manually won't send them any notification.
I don't know how it is for other users, but at least that's how it is for me.