+1 to juicejunky's post...many of the out of stock flavors were removed from the site, but I believe that anything that shows "stock level: 0" was available upon Don's return, but has since sold out. Just be patient, I have a feeling that the notification buttons will be back up soon (hopefully).
It was confirmed that Hunter's Blend is in a state of limbo (difficulties with ingredients), so I am not sure about that.