I've been combing through my screen shots, and it struck me... in the Helter Smelter Quest Log information, it lists '35 favor with Tii'. The Giant is clearly listed as Ti on the main pages (and something in my head says it used to read Tii), but my mind is scanning back to think of any other places where Tii might still be lingering.
Edit: Same with The Daily Grind and Perfectly Refined. Might want to revisit the Quest Rewards with favor associations to Ti / Tii to make sure you've gotten rid of the old names.