Crates Are For Digging Member since Aug 2012 25530 Points Moderator
Looking accross the various worlds on the tape site there's only Castle Communications but on 45cat there is a seperate Castle label as well as Castle Communications. So I would suggest where proven all releases should come under Castle Communications so there is no confusion with the Castle label. The main obstacle in completing your task is where there is only a cover scan or no scans is establishing what is the correct label.
Redpunk has beat me to it - Where there is just a cover scan it's difficult to categorically confirm a label.
As a starter, I would suggest that the Castle entries should be checked; on a random look through some of these related to Castle Music or Castle Communications; perhaps others are Castle Pie. Once the correct labelling has been established, furher consolidation can be considered.
The later challenge later would be entries where there are seemingly two designations; for example Castle Communications and Castle Classics - perhaps a pattern will emerge with the catalogue numbers.
It's also worth looking at 'Other Titles' on packaging - for example, on Giant Of Rock MACCD 119, 86 Castle Communications albums are listed from MCCD 101 to MCCD 186
For most of the releases you can go by the cat# I think.
It just feels, that Castle Communications' more like a company.
But whatever we need to do some re-organization.