I have a section in my document that is setup in landscape.

Even tho I have selected mirror margins, the gutter is appearing at the
top of all the pages, I would have expected that every alternate page
would have it at the bottom, as it will be going on the back of the
previous page it will require the gutters to meet up meaning no
text/images are obscures in the binding process.

Also, the gutter location is grayed out. If I was to bind on the short
edge of the paper, I would not be able to complete this without being
able to relocate the gutter.

can someone advise if there is another way to achieve what I need to do
without having to resort to making every page its own section and using
the margins to achieve the space required for binding?