Page hints have been added to recognise certain pages in an application but they are being ignored.
In a generic web application, FxM has to mostly infer the structure of pages (i.e. which hits make up a page). The algorithm for that decision making is not perfect and so Page/Hit hints are provided to allow customers to override the FxM decisions for generic web applications.
Remember page hints are just hints. Another way will need to be classify the application URLs.