Deleting connections

today I’m trying, with my bad English, to describe a problem to you. As already mentioned, I own a large collection, which I had to read into roon afterwards. Thought to make it easier for me by combining series as CD1, CD2, etc.
But since Roon can’t identify these packets at all, I started to separate these packets again. It is noticeable that I have to remove each album individually from this package, it would be nice to simply say: delete the connection and restore the origin of the albums.
Secondly, the following is noticeable: I have a package of ten albums, from which I remove one album each. But I have to realize that the number of tracks on the remaining albums doubles?!