To clarify, the Archivist should be contacted if you believe you should have a merit but don't; the Historian should be contacted if it's been awarded but isn't listed in the library :)
E-mail the Merits minions at merits@tarvalon.net and cc the Archivist at archivist@tarvalon.net, I believe. The Merits system is handled under her auspices. They'll get you squared away!