Project Name Variable

I am trying to creatie a layout to print 2 interlinked projects at the same time. I added the variable [project_name] to the header section of the lay out in Page Setup. When I go to Print Preview, the name of project B shows up in the header instead of the name of project A. I have made project A the Default Project, project A is before project B in the WBS, both projects are open when I click print preview, the project ID of project A is numerically smaller than the project ID of project B, and project A has an actual and planned start before project B.  My only thought is that Project B was created before Project A. If this is the reason project B is appearing in the header instead of project A, I cannot think of a way to fix this.

What do I need to do to make the project name of project A appear in the header instead of project B? I am trying to not manually type the project name into the header because I have multiple 2 project schedules I want to use this layout with.

Thank you.