We are working on squashing a bug right now that sounds related. Sometimes when your user session expires, the site will go into a weird state where it's not sure if you're logged in. When this happens, the best thing to do is hit the Log-out button and then log back in. The site should work normally again now.
Please keep me posted if this helps at all, or more importantly, if it doesn't. Also if you could follow-up in a private message with your environment (which phone OS, version, browser, etc) that would help us out as well.
I'll message you those info you needed.
Thanks for sending those specifics over and for providing more information on the problem. We definitely have the occasional hiccup still as we test the alpha system, and we really appreciate your understanding and input in getting them worked out.