"Commodore C64 - Collections - Derbyshire Ram (TOSEC-v2015-05-25_CM)" has lots of 'double description' errors where sets do not have a unique name, can you please fix.
That probably because there are multiple filetypes in that folder present. Not much to do about, it's a bit overkill IMHO to create subfolders [D64], [G64], etc.
Also (not a big deal for this release, but something to look at later) I've noticed the latest improved TDE picks up a bunch of new naming errors previously missed. Something to look at for next time. 
Do you mean names like this: "(B)arty-Demo", that's the name of the demo and I know I've fixed a couple (as in created more DatExplorer errors. I think it's a bug in DatExplorer that it can't handle special characters in titles). Or did you mean something else?
Regards,
Duncan..