There you are Sandra, somebody has given you a graphic illustration of the difference between member and guest posts.

The first was from a member whose moniker is Shambles. Nobody else can post as a member using that moniker.

The second post is more vague. It could be:-

1. Shambles posting as a guest, and using his own moniker.
2. A, probably malicious, guest posting to try to make Shambles look bad

This is why most of us have joined. This post cannot originate with anyone but myself, and I'll seize the opportunity to welcome you to the madhouse. It is almost always a nice place to be, and you can always ignore the few bad bits.

Welcome
Don T.