(I thought we already had a ticket for this, but I cannot find it... my apologies if this does turn out to be a duplicate)

To reproduce:

1. start adding a new release, http://test.musicbrainz.org/release/add
2. enter release name
3. ender release artist, but do not perform any lookups for the artist
4. do not check the various artist checkbox, and continue to the tracklist tab
5. enter some track names in the track parser
6. continue to editnote

On the missing entities screen you will have a N+1 entries for adding the missing artists (where N = number of tracks on the release). But this is a single artist release, so it should only ask details for that particular artists.

In general I think this tab should just consider all new artists with the same name to be the same artist.