Well I called it exactly the same to be sure I wouldn't make spelling errors I just copied the collection from the reader to my library, then synced and it would just add a second purchased collection to my reader, so somehow I think the properties of the copied collection are the different and therefor it would handle the copied purchased collection as different then the one in the reader. So when I sync again to remove it, it will only remove the copied (second) collection, but the original that I'm trying to get rid off just stays there. I also can't change the name so I could use it for something else since it also gives the warning that it's a synced collection and I can only change it in library first and it will change when syncing again.
So I guess I'm just stuck with it.
Andybaby, the collection is empty and it will not remove itself after sync, that's the entire problem.
Don't know what the problem is, might be a problem with the Mac version of the program or just a Mac problem, I don't know, but anyway I guess I'll just have to accept that the collection isn't going anywhere it's not usable either.
edited also tried uninstalling the program with the sudo command that I found somewhere on this board...and weird thing is it gives me that there is no such file or directory on my Mac. Something is really screwed up it seems.
This is the sudo command I found btw: sudo /Library/eBookLibrary/uninstall-eBookLibrary.sh