Accounts lose and regain their content posted

This has no know way to reproduce. I have two accounts that have both lost their content. It says I have to post to activate my account and doing so will not bring the posts back. Sometimes this lasts days or even months which has happened to me multiple times. Sometimes it gives me a defult name like "Swarthy-hat" or something like that. Its more an inconvenience since now I cant track my own posts especially since the names on posts are gone.