Logging in and out from the left menu has been a pain in the neck. If you wanted to login into MACCA Radio you would default back to oBLOGdi forums. This has been a problem for a while now but I do believe it is taken care of finally.
Whatever page you login in from, it will remember that page and bring you back to it after you have entered the correct login and password. The same goes for logging out from the left menu. It too will bring you back to the page from which you initiated the logout.
It should be noted that cookies should enabled in your browser setting and should be on medium security. If your cookies are not enable your browser won't remember next time you come to the site that you logged in and will want you to login agin. The settings currently keep you alive for 7 days. So after 7 days you will have to login again.