URL or SLUG question

Thanks Denzel.

I only created this page
http://hairsite.com/city-guide/hair-transplant-guide-boston/

I never created this (a post according to you)
http://hairsite.com/hair-transplant-guide-boston/

So my question:

Is this WordPress by design to automatically create a 2nd URL without the parent or category slug? in this case the parent or category slug is “city-guide”.

Again I never created the one you said is a POST. is this WordPress by design to automatically create the one you said is a POST and without the parent category in the slug or URL ?

It is becoming very confusing and difficult to manage my contents now because WordPress automatically generates a 2nd URL for everything that I created for as long as I have a parent category in the slug or URL.

Thanks