After a month or so of creation, topics won't let you edit them anymore. It's stupid, but you'll have to flag it and get a moderator to edit for you.
To save space on the initial topic, I've made sub-pages for the Matoran based on region, so you could ask the mod to replace what's in the initial post with those links. I'll take care of the ideas and images posted here.
Edit @Gresh113: The mods fixed the issue, you should be able to edit now.