Did the MC show the Adele files as "One Device" before you ran sync this time? If so this would have been from a previous sync that included the files, so Handheld Sync wouldn't have synced them again... but if they had been removed using an external application, or if MC got a little out of whack, you could get the result you see.
Try running "Rechceck Sync" and then check the status of the files displayed. If they move to "In Queue" again, retry a sync and see if that fixes the issue.
Note: You should find a "Database.mpl" file in the "G:\Music" directory (I think) of the SD Card, which is a file created by MC that represents what it thinks has been synced to the card. If you check that before you run "Rechceck Sync" and then after, you should see the changes regarding the Adele files. MC uses the "Database.mpl" file to rather than scanning the whole SD Card to see what is on there each time Handheld Sync is started, to speed up the whole process.