If I understand you correctly, you edited an album in MP3Tag. Did you click the SAVE icon in the upper left-hand corner?
Did you edit the files that reside on your computer? Or the files that are on your player? Some believe they must be edited while on the computer and then transferred to the player, but I have had good luck with MP3Tag editing them directly on the player.
If you edited them on the player, and then un-plugged from the computer, the ‘refresh database’ process might still be reading the ‘old’ info. I would connect in MSC mode and look for a file called ‘mtable.sys’ in your player’s root directory. This is your music database file. If you delete this, your player will build a new one from scratch with the current information on the player upon start-up/refresh. You should then see any changes you made to the ID3 tags.