Add/Edit PageField Default

Yes, this is how it's supposed to work.
By default it works on the Add page only. In some cases it makes sense to apply it on the Edit page as well.
If you are looking for more advanced functionality use Edit page events like BeforeEdit.

I want the default value to work on the Add page only. You stated the default is to work on the Add page only. From my experience the default value is applied to the Add page as well as the Edit page. I have the check box unchecked on the "Apply on the Edit page as well".
This is a default for the date field. I want today's date to be the default on the Add page but I want the data in the date field to be displayed in the Edit page. When I edit the record it inserts today's date instead of the date in the record being edited.
Am I still unclear on the concept?

As a first step make sure you run the latest version of PHPRunner (http://xlinesoft.com/download)
If this doesn't help post your project to demo account and contact support team directly.

I apologize, I am mistaken. I did some testing and it works as advertised. If I edit a record it keeps the original date and does not overwrite it with today's date.