problem with Single Page Website module
I had this issue when I was testing out this module as well.

Solution: Create an Alias for each piece of content.

Each node/page you want to include on the single page, visit and add the alias. As admin, visit say, your default page you wish to have at the top, click Edit, and create the alias. In MY experience, once I did this for the pages for the Single Page using the single_page module, it worked.