I have this site set as a "trusted site" with cookies enabled, and cookies enabled in my profile to avoid having to sign in. This "usually" works (maybe 70% of the time) but sometimes the site doesn't recognize me and I have to sign in again. Then it works again for a while.

Am I doing anything wrong that I could correct, or is this a system issue? If system issue, my computer or the server? Sorry I can't give a better diagnostic, but I haven't determined any precise pattern to it. I'd be happy to follow any suggestions to analyze further.