Thank you for using our forums. I am very sorry to hear about your problem with the guide being wrong. It sounds like the guide may have been configured incorrectly. When you configure the Slingbox in the setup, you would need to make sure that you select the digital option for your cable company. This should fix the issue. Below you will find an article on how to help you with reconfiguring the inputs.
Hope this helps,
The Sling Moderation Team