MyBB Community Forums

So I'm running a forum which uses steam login for (almost) all the users.  However there are a few logins which are not tied to steamID's.  Sometimes we can login to these accounts, but most of the time it forwards directly to Steam for authentication even with a valid user/pass.  How can I give both options?  I've tried doing super reloads and clearing cookies, etc.  Sometimes it works from a different browser.

Thank you in advance for any help you can provide, loving the software.