Hey angella,
Good catch,
After researching the topic, the login sessions only run for 24 minutes of inactivity...
After that all of the information such as UserID is deleted...
So... if you're doing a long post, it might be an idea to write it out in notepad, and then post after it's completed... this would be especially true if you're going to finish the post at a later time...
This makes perfect sense now...
I usually do a post and then save it right away.