If Extension Mobility is set, the ADP is generated. If you set up any profile that has an extension assigned somewhere else, you get the shared line even if Extension Mobility is not enabled on the phone.
To resolve this issue, check the Directory Number (DN) configuration for the extension, and make sure the Enable Extension Mobility option is unchecked. Click on Update, then click on Reset Phone. If that does not resolve the issue, delete the Extension Mobility profile for the extension.