I'm testing out the vBulletin plugin on v4.1.11. When user logs in and then clicks link to go to forum, user is not logged in already to forum and has to log in again. I have set up a product to access forum and protected the forum folder. Also, all aMember users have been put into COPPA. Why is that?
You have to upgrade your plugin. Issue with coppa was fixed already, single login issues can be because of that COPPA problem as well.