Bit odd, but when I see my posts they are by "Anonymous". If I log out, I can't see them! Looking back, I've not had any replies to quite a few of my threads. Maybe no one replied though, not sure. Not sure if anyone will be able to read this either!
A few times I've came back and it seemed like my posts were getting deleted, which discouraged me from posting. However, this was because I was logged out when I checked. If I logged in they would appear but from the user "Anonymous".
Seen a few other posts about this too - but they didn't seem to have a resolution.