I rearranged the episodes a while back using info from the press releases I could find online since I couldn't find the link for the Disney XD website or the Disney XD press website from 2014. The press releases I found called "The Return of the Guardians of the Galaxy" a special episode released before the Season 3 premiere, "Halloween Night at the Museum" a special crossover episode, and "Nightmare on Christmas" a special Christmas episode. Calling the episodes "special episodes" doesn't necessarily mean they're specials but they did air out of the normal time period and/or network.

I went searching for the websites (again) after reading your report and, after a lot of searching, I was able to find the show's website from 2014 with the episodes on the site! I also found the press website for the show from 2015.

On the show's website (here for the Guardians episode, here for the Halloween and Christmas episodes), they appear in the "Episodes" section, mixed with the other episodes. They are unnumbered but so is every episode on the site and there is no extras section so I'm taking the placement under the "Episodes" section with the others to mean they are regular episodes. Sadly, this means I had to combine The Avenging Spider-Man (1) and The Avenging Spider-Man (2) since they are listed as a single, double-length episode on the site so the season will have 25 episodes instead of 26.

I was incorrect in moving those episodes to Specials as I can see now with the archived Disney XD website and Disney XD press site, the info I had found and thought to be good was actually not.

I have realigned all the other languages after @raze464 English corrections.

https://en.wikipedia.org/wiki/List_of_Ultimate_Spider-Man_episodes#Season_3:_Web-Warriors_(2014%E2%80%9315)

https://www.imdb.com/title/tt1722512/episodes?season=3

this site is a fucking mess, always reinvent the wheel

@decki said:

https://en.wikipedia.org/wiki/List_of_Ultimate_Spider-Man_episodes#Season_3:_Web-Warriors_(2014%E2%80%9315)

https://www.imdb.com/title/tt1722512/episodes?season=3

this site is a fucking mess, always reinvent the wheel

Here, we always list the episodes in the order they have been originally broadcasted, which is not the case on your 2 links.