Report your bugs here - if someone else has already mentioned the same bug, just add on to their post with as much info as possible to make the hunting easier.
Pulling up a Statistics report on my movie collection shows duplicate metacritic scores. Perhaps simply a parsing problem (one of the pairs of similar scores has, e.g., a space)?
Thank you for the screenshot and the info. Plus the had work of doing the debugging and finding out it was the extra space, fixed and in the beta version and will be part of the next release.