Well - after spending even more time on this it's becoming obvious this product is not fit for purpose. For some reason it assumes you'll have a single copy of any given track and no matter what you do in an attempt to get around this, you just cannot upload a second. I'll assume it is something to do with the "match" facility, but as you have no control, no option to over-ride any of this, you are stuffed. I was trying to move from Amazon music, however as they do offer features that basically allow you to do anything - their service is a lot better than this one.
My latest issue:
Upload Oasis - Stop the Clocks. All tracks upload except one, Track 4 Lyla.
Already uploaded is Oasis - Don't Believe the Truth. Track 3 here is Lyla.
Tried totally renaming the track - so giving it a new file name, changing MP3 tags to something like "Track by Generic Oasis". Hoping I might be able to rename it once uploaded. Manager tells me it has uploaded, doesn't appear anywhere.
Deleted "Don't Believe the Truth" from the server and uploaded Stop the Clocks. Now all tracks are present and correct for Stop The Clocks including Track 3.
Now attempt to upload "Don't Believe the Truth" once more. Track 4, Lyla, missing.
There is no way that I can have both of these albums uploaded to my library, completed, because the system will now allow this single track to appear in two separate albums.
So that's me out - far too much time spent on this. Amazon may cost money....but at the end of the day it works.
Hopefully someone might come along and look into this issue for people in the future who will see this issue. My advice, pony up and go Amazon - 100x better service.