@visoseph since you have multiple SEASONS This series, it uses TheTVDB for matching, its title is ‘Attack on Titan’ on TheTVDB, not ‘Attack on Titan (2013)’ so you reach 78 score which is short of 80 so cannot be automatically assigned.
You have to match the title on the metadata source (AniDB if single season or TheTVDB otherwise), or use a forced id in the series folder or a tvdb.id file with the tvdbid inside…
