If a song is available twice on Spotify – for example as a single and additionally as part of an EP or album – the streams from both versions are added together. This is only possible if the same ISRC has been added to both versions. If, for example, the single is entered first, you must then ensure that the same ISRC is used for the corresponding song when entering the album. In addition, the metadata must match; artist, feature, song title and title version must be identical.
To make sure this is not forgotten, iGroove has a warning message built in.