I've been posting on this bug since the launch of 2.0 and while it has been moved to accepted. It has been a year, and has yet to be resolved.

Titles from 1.0 are not received:
"Inquisitor"
"Divine Crusher"
"Stonesplitter"
"A Kobold's Worst Nightmare"
"An Ixal's Worst Nightmare"
"An Amalj'aa's Worst Nightmare"
"Crystal Bearer"

Titles obtained in 1.0 but still available in 2.0 not received:
"Archmage"
"Cavalier"


Date & Time:
2.0 Launch to Present

Frequency:
Persistent

Character Name:
Fenwick Fuerlas

Race:
Keeper of the Moon / Miqo'te

World:
Balmung

Class/Level:
Any

Area and Coordinates:
Everywhere

Party or Solo:
Any

NPC Name:
None

Monster Name:
None

In-Game Time:
Always

Steps:
1. Checked Legacy achievements.
2. Legacy achievements unlocked.
3. Titles unavailable from legacy achievements