Missing Archmage Title

[ephekt]

Time: n/a
Frequency: Always
World name: Excalibur
Character name: Winter Mute
NPC name: n/a
Monster name: n/a
Class/Level: Everything at 50
Party or solo: Solo
In-game time: n/a

I've been missing the Archmage even with all my mage classes at 50. I thought maybe this had something to do with having a Thaumaturge and Conjurer at 50 from 1.0 but even after leveling arcanist to 50 I am still missing this title. Please see attached screenshot for proof of completion.

[HEC]

Have you spoken with Jonathas in Old Gridania (10,6)?

[Yasminou]

I am in the same situation: conjurer and thaumaturge lv50 during V1, arcanist lv50 now and still no title. Do you also lack the title from this achievement?
Speaking to Jonathas does not change anything for me, even though I try to do it after each update of the game...

[Surian]

You only get the achievement if you did ALL the quests for those classes. Simply leveling them to level 50 wont do it, you have to do all the class/job-quests as well. Only once you've done that will you get the achievement.