I thought I heard someone mention that a page move to
an
existing redirect was possible?
"Move" is only allowed when either the destination page doesn't
exist at all, or else it does exist, and contains nothing but
a redirect to the source page and has no history. So if you
move a page somewhere, you can usually move it back without
having to delete the old name. But you can't move a page on top
of a redirect to something else, and you can't move a page onto
a name with any history.