And I think I have reproduced how it happens.
Im already logged in the scenarios below
#1
I logout through the sidebar widget in wordpress.
I go to the embedded phpbb forum page, login and it takes me to the full phpbb page.
#2
I logout through the embedded phpbb forum page
And login again through the embedded phpbb forum page, and it takes me to the embedded phpbb forum page
#3
If my cookies has been cleared "logged out" and I go to the embedded forum page to login it will take me to the full phpbb forum page.
I hope you understand what im writing :p
if you want to test it out on my page you can to it here http://rng.clanroyal.dk
You already got a user there
