I wish I could take the credit, von, but I can't. I had the same situation with this one BB that I visit about once a month. All of sudden I had to log in and I couldn't remember my log on information, had to have it emailed over. I went through what you just did, check the box, log on, use, never log off just close tab. Next time, same thing
This went on for about six months. Then one time I open up website and can't find the log in box.
Somehow it remembered me that time and all times since then. But I just ran CC cleaner and bet that I'm back to square one on it again.