As you can see on the archived version of the ABC website from the time of the broadcast, season 11 had originally only 24 episodes.

Yes like you said... it's an archived one... And in France, the season 11 have 25 episodes not 24 All is not arround the usa

All the series on the site are listed as per their original broadcast. (This is not necessary the USA one).

If i read the guideline TV

Content allowed in the TV section:

Television shows

Miniseries

TV movies originally released in two or more parts

TV pilots

Web series

Annual award shows

Content NOT allowed in the TV section:

Film serials (popular in the first half of the 20th century). They should be added as one entry in the movie section.

No diet, training, religious, language learning programs, or other types of instructional video sets. They should be added to the movie section and marked as a video (if properly released).

TV and digital movies originally released in one part.

Any TV specials or one-off event. These should be added as a movie.

Season 11 Episode 22 She's Leaving Home is a one-off event based on the death of derek shepard

"She's Leaving Home" is the 22nd and 23rd episode of the eleventh season of the American television medical drama Grey's Anatomy, and the 242nd and 243rd episode overall. The episodes aired on April 30, 2015 on ABC in the United States. The episodes were written by Stacy McKee and directed by Chris Hayden. On its initial airing it was watched by 8.74 million viewers.[1]

The two-hour episode serves as a tribute to the death of Derek Shepherd, the show's male lead played by Patrick Dempsey, who died in a car accident in the previous episode. In the episode, the doctors at the Grey-Sloan Memorial Hospital mourn the death of their colleague and friend following the tragic accident. The episode also focuses on the struggle of Meredith Grey (Derek's wife and the show's protagonist) after she disappears from Seattle and adapts to becoming a single mother before giving birth to her third child, Ellis Shepherd.

You misunderstand the rule.

An episode of a series is NEVER a one-off TV special. A one-off TV special is a TV show broadcasted as one independant emission.

The only reference is tha ABC website at the time og the broadcast and this one is archived here.

Our rules are clear. I quote : "Episodes should be added exactly as they first aired on the original network (title, date, order, season). "

Ok the simpliest way was to explian to create another episode order...

Not to block all

Episode groups aren't blocked, but they only allow you to order differently existing episodes. You can't split an episode in 2 parts with an episode group.

Could you unlock the episode of Season 11 and lock the production order of this season.

To add DVD order I need to create some other episode like they are in the DVD.

It's impossible to use Episode groups feature if you lock the wrong section

No. We have only one single episode list.

As indicated, episode groups can only be used to change the order of the broadcasted episodes, not to split episodes in 2 parts.