Please provide source for your data.

The Muppet Show is A UK original show - NOT a US release. The default order should follow that of the UK release, which is the same as the DVD Release. The correct Order can be found on the fan wiki, along with the original UK airing dates - https://muppet.fandom.com/wiki/List_of_The_Muppet_Show_episodes

I just have a look and the episodes are correctly listed with the UK dates and sorted in the order of the original UK broadcast.

Warning : The Fandom list the episodes in the production order and not in the order of the original UK broadcast.

It actually lists the production order, and the airing order for both UK and US. This release order is also reflected on the official DVD releases of the show. The majority of people who will be using the TMDB data will use the DVD release order, which means users will have to manually resort the entire library. The default order should be the production order, not the aired order, as this order is consistent across all releases.

As per our rules, all the series should be listed based on the first broadcast order.

If you want them in the production order, you need to use this episode group.

If that is the case, "as per the rules", Dudley Moore S04E07 should be listed as S04E01 with a release 1979-10-24, but it is in fact listed as S04E01 1979-10-29. The provided default list dates are inconsistent at best.

@p01arst0rm said:

If that is the case, "as per the rules", Dudley Moore S04E07 should be listed as S04E01 with a release 1979-10-24, but it is in fact listed as S04E01 1979-10-29. The provided default list dates are inconsistent at best.

A typo can happen. This has now been fixed.