Hey guys,
the "maintenance problem" is probably due to a bigger update on our backend. When doing that, there are usually some smaller bugs here and there that are fixed within the first days after the update. By the way, one of the new things: you can now rate recipe modules, and by that, rating stars are depicted inside Google SERPs.
With this update, we switched to cookie based sessions: Until now, the "Remember me" option was saved in our database, but now it's saved as encoded cookie inside the client's browser. I'm about 99.9% sure that the recent login/logout issue is related to that. I couldn't notice this problem on my system/s so far, so it's a bit hard to debug. Therefor, any information you can give is helpful. Possibly it has something to do with the cookie settings of your browser/s - maybe a limited life time of cookies or something ...
Anyway: sorry for the inconvenience! If we can't solve the issue soon, we'll switch back to the non-cookie based sessions.