Saving documents into category vs. attaching to secure note

Custom inline file attaches to all item types have been implemented last year with the version 8 client and the website has not been updated yet to support these file attaches as well. However, all apps and the browser plugin support file attaches, so you can access them with these. It's just a display issue, the file attaches are just not accessible with the website, but they are all saved in your vault and synced to every app.