Apparently it IS a cookie thing going on... I just went back through my link and as you say, NO DEAL.
So I scrounged my trash and got the affiliate link, went through there, and now the deal is back, even when I navigate straight from the front page.
So, I guess the choice is up to you or the moderators, if its OK to post an affiliate link (Im NOT the affiliate)
Or unless there's a cookie wizard here who knows what else can be done.