FFXIAH pulls its data from Guildwork and the Linkshell Community. LSC hasn't been updated to track Adoulin progress, so FFXIAH can't pull mission ranks from it, and thus can't calculate achievement points for it.

Overall ranking is what your rank in achievement points is counting everyone. Server ranking is your ranking on your server in achievement points compared to everyone else on your server. The site admins determine what content is worth what amount of points, and they have prioritized REM weapons after Abyssea made leveling so easy.