The German release yeah has only 23 tracks. All my CD players (Pc included) recognize only 23 tracks, also the Clone CD software read 23 tracks.
Discogs (
http://www.discogs.com/Rare-DK-Jamz/release/514350) report a track number 50 with no playing time. Maybe an error?
About DK Jamz on sleeve card I don't know. I put it here only for reference for now.