This could be caused by human error such as typos, or could be related to mismatched third-party data. Tunefind automatically tries to fix links to the music services we feature, but this only works with an exact match.
If we've got something that needs to be fixed, please contact us with full details, including the URL of the listing to be fixed, and the correct information, and the Tunefind team will do their best to fix it.