I was trying to see what all of the emojis were. Then I decided to see what would happen pasting them into a message. Testing the parameters.
If I had seen a message that said “Emoji limit is 25” I would have understood.
If I had seen a message that said “post body cannot be > n chars” I would have understood.
500 Server Error after several seconds of the post actually appearing I do not understand.
A reversion to a previous edit when the page is re-loaded I do not understand.
I was not aware of http://emoji.codes - not sure where it’s linked from, but it does not appear in the emoji-popup in Firefox.
At any rate, linking to and referring to http:/emoji.codes would not embed ALL the emojis into a post. And it certainly wouldn’t provide them alphabetized.