Areas and area boundary lines can only be copied on to another Area Plan. Be sure to create a new Area Plan for the level you want to paste on to, then use paste aligned. You can use Paste Aligned > Select Views or switch to each view and use Paste Aligned > Current View.
Hope this helps.
Erik Snell, P.E.
Experience Design Architect
Autodesk Revit
I am an Autodesk employee and the opinions or commentary I provide are my own and not necessarily that of Autodesk, Inc.