This is at least the second time I've had to report this exact kind of problem with Pandora. The album Sorgir by band Skálmöld is listed incorrectly under band "Skalmold", without the diacritics. This makes it hard to find. I reported the same problem with their second album Börn Loka years ago. Please fix this.
Not sure if this is the right thread, but I didn't find anything else. https://www.pandora.com/artist/mntl819-and-reindeer/ARJX2kZxxhZVK5V is misspelled. It's actually "lmntl819 & reindeer" (note the missing "L" in the beginning).