Summit Broadband provides a Clear QAM (Unencrypted) Digital Basic lineup by using PSIP data (Program and System Information Protocol). Channels may not map properly if the manufacturer has implemented the PSIP standard different from the industry standard.
Some manufacturers have released firmware fixes that can update the software on a Digital Television to fix PSIP issues. Consult the website for your TV manufacturer to see if there are firmware updates available for any PSIP issues.