Hi, Bill - I could set my Bookmark to three days, but the usual way I access the forum menu is from the "Forum Home" links at the bottom of each message - those links are set at one day. As you found out, you go to a 3-day "Forum Home" page after you post a message. My humble opinion is that a 3-day list would help discourage people from posting duplicate threads and 'refresher" messages.
At a concert I attended last year, Joan Baez started to say, "In my humble opinion..." She stopped herself and said, "You know, I've never had a humble opinion in my entire life." I'm sure she'd used the line before; but it was a good one, nonetheless.
-Joe Offer, also not very humble about his opinions-