I've got a site that only has one available page layout for editors to use. it's the default page layout for the site and no-one else has access to change it.
However, when I create a page and save it if I just keep hitting F5 every 10 or so refreshes it will load a page layout from one of the other sites in the site collection.
If I edit the page at that point, the only option I have in Page > Page Layout from the ribbon is the page layout that's being loaded erroneously even though if I go back into the page layout config in site settings it's still showing the correct layout as the only one available and set as default.
Any ideas what might cause this?