Are the options that you set on the Blog settings tab? If so, make sure that the settings are under the “Single Page” section. If you are still not getting the correct layout that you are looking for, please let us know and give us a link to a sample post that shows the issue. If we could also get temporary access to your site, we could help get things in order for you, then let you know what was done.
We’re here to help, so let us know what you need.