Secondary replica database file location in Availability Group
If you try and open the database properties window on a secondary replica, SSMS will throw you an error, so my guess is that you're not actually connected to the secondary replia when you're checking these paths.
Run the following on both nodes:
select db_name(database_id), name, physical_name
from sys.master_files

This will show you the physical paths that SQL Server is using to access each file, and I would expect will show you different paths on each replica.