> Although when I tried to connect to that one I keep getting sent to an overflow channel instead
some channels require for you to register and identify before being able to join
you should read the topic
Your channel may also be "identified-only" (+r); join #please_register for more information. If you need help, message a freenode staffer or email email@example.com. Thanks!
The channel you tried to join is set with mode +r. Only users who are registered ("/msg nickserv help register") and identified ("/msg nickserv help identify") to NickServ can join. Please follow the steps on http://freenode.net/faq.shtml#nicksetup