Yep, that’s it. The explanation: most modern players have an internal database using metadata–the ID3 tags–embedded in the song files. The major metadata/ID3 tags are for album, song, artist, year, and genre. When you select a song to play on your player, you are selecting the ID3 tag info. that is in the database. The problem then is, sometimes this info. isn’t already filled in when you get a song, or is incorrect. That causes issues for the player.
Nicely, the Clip also has a separate way to select a song to play, under its Folder option at the bottom of the Music listing. With the Folder option, you select music to play just like on your computer, with the songs ordered by filename in alpha/number order. A good option when the database method won’t work because the ID3 tags had not been filled in, or are incorrect and you haven’t had a chance to edit them yet.
And so: you use MP3Tag to fill in/correct the Track numbers under the Track column, and then you save your editing work. (Of course, you also can edit/correct the other info. for a song: the filename, the album name, song name, the artist name, etc.) At that point, you simply use your PC and its regular File Folder viewer and copy the songs or the entire Album folder that they are in, and then paste that into the Clip folder–many people use the Music folder on the Clip, to help keep things organized. And then you disconnect. At that point, the player will spend a little bit of time “building” its database from the ID3 tag info. in your songs–if you have alot, this could take many minutes. And then it will be done and show you the regular screen, and you can enjoy your music in the correct order, just like on a CD or record!
I hope this helps–let us know if it works out for you.