When I checked if the segments are how they are ordered, Madrigal Alphabet isn't there. Some Muppet Wiki users that are fans of vintage Sesame Street (including myself) will eventually click on the Episode 0619 page where the skit made it's first appearance. And they might think "What happened? Where is the sketch at? I can't find it".
I've seen some conflicting info regarding the first use of "The Ballad of Casey McPhee," as an example. And a couple of examples of a bit being mistaken for another one, which is their error, not ours.
It seems like this lists a few things that contradict CTW Archives info. I know that the program guides were printed before the final edits.
I would have thought that the "First Season Show Content" would have had episode numbers added in after the final edit, but I have found some errors there, particularly with first appearances (and after episodes have been guided, some segments still have the previous "first" listed on other episodes). Should these inconsistencies be noted, at least for the first appearance? I'll have to look a bit to remember all I've noticed, but I recall that the files list "Alpha Song (small letters)" as debuting in the first episode when it actually first appeared in Episode 0010, "Lulu's Back in Town" is listed there as debuting in Episode 0019 instead of Episode 0030, and the "I-Impolite" cartoon is listed as debuting in Episode 0031 when it actually first appeared in Episode 0033.
Looking at instances about seasons listed, I know that the guides often list production codes by segments with the first two numbers representing what season it was taped, but are there also guides that just list seasons without (or in addition to) a code number? Some of those season inconsistencies could be a case of segments being held over for a season. When Sesame Workshop officially lists a season that a segment was from, it tends to list them by production season ('for example, many of the segments listed as being from season 11 in Old School: Voluem 3 and 40 Years of Sunny Days have turned out to have first aired in season 12, and there are many sources that list season 7 as when the Pinball Number Count series was made, so I was shocked to see on the page that all of that segments firsts were season 8 episodes).