Currently, the forum "Smileys" only contains a subset of emojis available from Twemoji. Each version of Unicode standard also adds in more and more emojis. This makes Smileys somewhat limited, and because of this, members use a mixture of Smileys and actual emoji letters, creating the inconsistent look and experience.
Each revision of Twemoji also adjusts how some of the emojis look, to express the ideas more accurately, to reflect on their values, and to be more in line with the guidelines and standard. Currently, Smileys is using an old version of Twemoji.
Please update the existing Smileys to match the new styles, and adds all the missing ones into Smileys.
This page is the entrance to Twitter's Twemoji repository :
https://twitter.github.io/twemoji/