The problem exists since several years.
For some weird reason amiga.org and
http://www.amiga.org is not the same. So if you login to amiga.org then
http://www.amiga.org thinks you're still not logged in, or vice versa.
Very annoying.
The webmaster (is that still the name 2016?) should make sure the whole site depends on amiga.org OR
http://www.amiga.org .