Identify the desired position in the story
A special can be stored separately while the viewer wants it presented between particular regular episodes. Start by distinguishing storage organisation from in-season display order. Moving the file into the ordinary season without checking its identity can lead to another wrong match instead of solving the presentation question.
Apply the documented special rules
Jellyfin uses Season 00 for specials and warns that special-episode numbering can differ between metadata providers. To show a special within a season, its guide requires the relevant display option plus metadata identifying the season or episode it airs before or after. If the provider has no matching special, descriptive naming is recommended rather than attaching an arbitrary special number that pulls unrelated information.
Review one known special before changing a series
For example, a household following a story with an intervening special should confirm that special’s identity with the selected metadata provider, then inspect the display setting and ordering fields. Preserve any manual metadata and check the resulting sequence in the intended client. Do not assume a number found on a different catalogue means the same instalment. If the special is still misplaced, record whether it is correctly identified but differently displayed, or incorrectly matched in the first place. Those are separate stages, and a complete series rename is not a useful first response to one ordering field.
Questions, answered
Does Season 00 alone determine the special’s place among regular episodes?
No. Jellyfin documents additional display and ordering metadata for that presentation.