Hi. We have a policy of showing sources, which has been an issue with some of your edits. In the case of the song dates you've been changing, they are not sourced by their earliest known appearance, but from official copyright dates (which can come from songbooks, album liner notes, etc.), so they should not be changed otherwise. With that said, I would recommend focusing on another part of the wiki. Also, please reply back so we know you understand. Thanks.
Alex, your lack of ability to show sources for questionable additions (for example, this) continues to be a problem. For the second time, please respond to this thread so we know you understand these concerns. If you continue to add faulty information to the wiki, you will be blocked from editing.
You still seem to be confusing the ekas as actual dates, therefore I would advise you to please read Muppet Wiki:Earliest Known Appearance; which justifies that more often than not, the ekas don't factually represent when a song or segment was made, whereas ones that are marked with a first tag are confirmed to have aired in a specific episode.
Also, communicating is an important aspect in working on the Wiki, so for a third and final time, please leave a reply so we know you're actually reading this and understand.