I will be investigating this, you can't necessarily trust IMDB for accurate episode data... please do not renumber episodes or remove data, a moderator will take care of it. Thank you.

ETA: The "duplicates" were not duplicates, two different production codes means each hour-long showing of the office was two episodes IE, http://www.thefutoncritic.com/listings/20070917nbc10/ http://www.thefutoncritic.com/listings/20071008nbc12/ http://www.thefutoncritic.com/listings/20070924nbc12/

Sorry about that. Wikipedia says "The season was interrupted and shortened due to the effects of the 2007–2008 Writers Guild of America strike, in which the writers and some actors of The Office went on strike; although 30 half-hour episodes had been ordered, only 19 were actually filmed. Several of the finished episodes were condensed into hour-long episodes, resulting in only 14 episodes being aired."

Considering that TMDb lists the aired episodes instead of the filmed episodes, shouldn't there be only 14 episodes? Right now, 5 of the extra episodes differ just in number and not in any actual content. The air date, the title, the episode still are all the same.

Considering that TMDb lists the aired episodes instead of the filmed episodes, shouldn't there be only 14 episodes?

It depends on how they aired and how they are added to the official website. I can't find any web archive for 2007, but if you hover over the Episodic Gallery link here, Goodbye Toby is Episode 418.