We used to have the ability to sort tracks in an album by title, length, popularity, and of course track number, at least in the web app. This is no longer possible in the web app, and it’s also not possible in the macOS or Android apps. Now the only way to sort tracks is to add them to a playlist first. This is quite a decrease in functionality. Restoring it would be a good way for Deezer to distinguish itself from Apple Music, Spotify, etc., which don’t have the capability. So please restore the ability to sort tracks in an album by title, track number, length, and popularity.
By the way, there’s another suggestion like this by