When importing a new page to your WordPress Blog site from ClickFunnels you will need to set the Custom Slug for the page you are importing. You will need to make sure that the Custom Slug you are setting is unique per each page you import from ClickFunnels. You will find Custom Slug setting on the Add New Page settings area as shown below:
Further ClickFunnels WordPress Plugin Assistance
If you have any other questions or concerns, please submit a support ticket at https://support.clickfunnels.com/support/tickets/new.