From the comments posted here already it sounds like you have purchased the Virgin Re-Mastered Japan/ Sylvian CD's which were released in 2003. Thereafter in 2004 came the Hansa Re-Mastered CD's which had extra video tracks etc.
On 29 May 2006 EMI re-released the 2003 Remastered CD's at a low price; £6.99 (Tower Records). The difference is that these are all in standard Jewel Cases & not the digipaks already mentioned here. Furthermore they don't include the extra photo's/ pages etc. As a collector they are a must!
Gentlemen Take Polaroids: CDVR 2180
Tin Drum: CDVR 2209
Oil on Canvas: CDVR 2513
Rain Tree Crow: CDVR 2659
Brilliant Trees: CDVR-2290
Alchemy An Index of Possibilities: CDVR 23
Gone to Earth: CDVDLR 1
Secrets of the Beehiver: CDVR 2471
The Tin Drum CD does not include the bonus CD as with the 2003 Box Set. Oil on Canvas comes on 1 CD now instead of the 2 as with the 2003 Digipak
Hope this helps in your search when making a purchase
Stefan