How to handle dates in titles?

[Backwoods Genius]

I had a show with a year in the title that got misidentified and re-done AFTER it had already been in place for a while. The folder named was in the format;

Code:

Series Name (start year) [tmdbid-xxx]

It had been working fine, had all the correct episode titles and everything. Then it randomly got replaced with a series with a similar name that aired in the year given in the title of the actual series. I thought the purpose of the formatting was to prioritize information? Why did it ignore the tmdbid and overwrite an existing nfo with incorrect data?