Using Publisher 1.7.3 on macOS 10.15.3 (Catalina).
Within a new document, having the default Master page (Portrait) I created a second Master page in Landscape orientation, yet all new document pages created from this Master page appear in Portrait orientation.
The resolution is to right-click the new page thumbnail and select Spread Properties, when the Portrait box is seen to be checked. Unchecking this box sets the page (correctly) to Landscape orientation.
Checking the (Landscape) Master page in the same way (via "Spread Properties") shows the Portrait box to be unchecked.
Why is this happening, and how can it be avoided, please?
A sample file is attached.
Regards,
Tony Moss
Wrong Page Orientation.afpub