Hi, Nobody from last.fm staff, nor any of us, the users (whether we are subscribers or not) controls directly the songs in the tracks list from artist's page, in the way you asked ! The songs gathers in that list as we, users, scrobble those songs !
So, lets say someone from the staff would delete those songs that you asked, you can imagine that it's very likely that some days later, another user will play them, and scrobble them, and ... they will appear back in that list of tracks, isn't it ?
Thus, the only thing that can be done from the staff part, is to auto-correct scrobbles for artist CCCP to the other one, CCCP Fedeli alla Linea; and of course, redirecting "calls" to CCCP to the other artist (that is, when you try to access artist CCCP, you'll be redirected by the system to CCCP Fedeli alla Linea).
Other than that, there isn't anything that can be done.
Unfortunately, even this option is not possible, in this particular situation ! Because the name CCCP is shared by other artists as well !! (there are 4 with this name, and only the first, the Italian one, is supposed to redirect, right ?)
Until the disambiguation that is promised is not finished, you will have to deal with this situation, whether you don't like it.