Hello,
when using the option “Content Width” in a Layout Element, the setting of the Content Container of a page is ignored.
This is how the behaviour can be reproduced:
1. Create a new Layout Element and set the Content Width to e.g. 700px and the Location to “Entire Site”.


2. Create a new page and set the Content Container to “Full Width”.

The width is limited to a maximum of 700px.
Tested with the latest WordPress, GeneratePress and GP Premium version.