iTunes 11.1.2 not registering new ID3 v2.4 tags (Deleting music from both library and HDD)

I'm a DJ and therefore have ALOT of editing in my iTunes music library (adding and deleting tracks, commenting, adding tracks to new- and smart playlists etc.).

Music management on the hdd -wise, I frequently use the ID3 tags for deleting tracks from both the music library and my hdd, but since updating iTunes to 11.1.2 i'm having difficulties.

I have this routine for deleting tracks:

1. Rating tracks due to delete with 0 stars
2. Going to smart playlist called 'To trash' (filter = 0 stars), select all tracks
3. Adding/changing genre to 'to trash'
4. Searching for 'Move to trash' in my HDD music folder
5. Move all mp3 files to trash, empty trash
6. iTunes, run Doug Script 'Super Remove Dead Tracks'

After the routine, all tracks I decided to delete, where deleted from both the library and hdd folder.

BUT, now it seems that Finder doesn't find any mp3 files with the ID3 metatag of 'to trash' (Step 4), hence i cannot "smart find" the tracks i want to delete.

Possible cause of the problem: i'm suspecting it to be iTunes not "tagging" properly;

All of my "DJ-tags", such as 'MTV' and 'Mainstream' etc, in comments, tagged before updating to 11.1.2, can be found by these metatags, but it seems like new tags/comments are not "registered" in the ID3 metatags - at least not recognized by Finder.

Note: I know that i can just downgrade to an earlier version of iTunes, but I'm very interested in having my equipment up to date, since I'm using it professionally, and want it to be as stable as possible with my hardware.

Any suggestions?