Just been studying the Chartbuster Disc Id numbering and I don't see any way of importing with those numbers into Hoster as they are.
That disc you say is CBE2-30-06 is Under The Bridge.
According to what I looked up that disc ID is: Why can't we be friends - War.
So I don't know if Hoster has Re numbered it with another Disc ID.
When you re-imported them did you set the field order to ignore, ignore, ignore. as I suggested ?
Because then it shouldn't know if it was already imported but you won't show or know it's true disc Id in Hoster.
If you actually need to import with a recognisable Disc Id then the only way I can think of is to re-name the files before importing them with "Bulk Rename utility" which is a free file renaming program.
I would suggest changing the name from CBE2-30-06 to CBE206 - 30 which moves the track number and joins the last two figures to the disc id.
From what I can make out CBE2 has 15 sets each with about 30 tracks, the tracks being the middle figure.
I did a similar thing myself when importing a Cavs version of chartbusters.
The bulk renamer can be downloaded from here:
http://www.bulkrenameutility.co.uk/Main_Intro.php