Hi, just saw your post. We all have two 'names' when we register: username and display name. The 'username' is what we sign on with to the website with our password, and the 'display name' is what everyone sees when we post. For example, when I sign on, I have to type in 'lanieg' because it's my username but when I post, it automatically shows as 'Lanie G' because I chose it to look like that.
What I see on your account is that your 'username' is cbent-41, and your 'display name' is Imabent. You can change your display name to what you want by going to My Profile page when you sign on.
When you want to respond to someone's post, click on Reply under that post and you can post your comments. I hope this helps. Post back for more help!