Make it work with a CPT

I made changes to the “Allow Numeric Slugs” plugin to remove the -2 from our CPT slug, but now if the CPT is a child it gets redirected to the parent post.

Here are all live links and code:

This is a parent page/post within the CPT (which works fine)
https://chrsdev.com/testurls/we-buy-houses/california/

This is a child page/post of the above parent page, but it brings up the content of the parent page. (which is NOT correct)
https://chrsdev.com/testurls/we-buy-houses/california/818/

If I don’t assign a parent page to “818”, and just have it be a top level page, then it works fine, but when I assign it as a child of the parent page “california” the content of the parent page gets displayed.

Here’s the code for registering the CPT
https://codepad.org/Wm5UwkND

Here’s the code for the plugin (originally only for post type “page”, I changed it to work with our CPT ‘area’)
https://codepad.org/Z0hZyFKl

The page I need help with: [log in to see the link]