I do not have access to Disney+. Could you post a screengrab of the episode list, proving there's only 11 episodes?

It is not possible to upload an image, but also the on the imdb it has 11 episode: https://www.imdb.com/title/tt11199558/episodes?season=1&ref_=tt_eps_sn_1 And on trakt.tv: https://trakt.tv/shows/pixar-in-real-life/seasons/1

You can upload the image on a dedicated host (for example, I use www.casimages.com myself) and post the link here.

https://www.casimages.com/i/210111113115744992.png.html

Thanks for the screenshot, I have removed episode 12.