I don't think you missed everything up, but I'm a little confused as to what you're asking in all honesty.
For JFBConnect, you generally need a Facebook 'application'. This is separate from your personal account or business. When a user Logs in With Facebook, they are 'approving' the use of your application, and JFBConnect then connects their Facebook user account to your application and pulls their information into your site.
You may have a separate Fan page for your business. This can be shown to your users using the JFBCFan module. Users can then see other users who have Like'd your Fan Page.
I'm not sure what you mean about the 'post your making'. Can you describe this further as to what your posting, and how? When you make a comment or Like something, your usually doing this with your personal account, and so when that happens, it posts to your personal account wall. The way to change this is, in Facebook, use the Account drop down and select "Use Facebook as Page". Here you can select your business account, and postings you make will go to this will. This is outside of JFBConnect completely though.
Hope that helps explain the overview, but if you have other questions, just let us know!