I've posted on the forums and also attempted to contact a GM in game multiple times regarding this issue to no avail.

Frequency: Always
World name: Sargatanas
Character name: Rave Solrune
Steps:
1. Open Character Menu.
2. Select Profile Tab.
3. Open Title drop down menu.
4. Legacy Titles that are marked as completed in my Achievement Log do not appear in the list of Titles.

Achievements I've completed that reward a Title but are not appearing in my Title list:

"Notorious Monster Hunting" Achievement for "Notorious Monster Hunter" title.
"It's Reining Deer" Achievement for "Wild Thing" title.
"Cascadier for Life" Achievement for "Cascadier" title.
"Chock-full of Elemental Goodness" Achievement for "Crystal Bearer" title.
"Been There, Done That" Achievement for "the Wanderer's Shadow" title.

Appreciate your help.