For all dungeons that drop motifs, their motif achievements are located within the categories for their source dungeons.
For trials, this is inconsistent:
- Craglorn (HRC/AA/SO): It's in the Crafting category.
- HoF/CR/SS/KA/RG: It's in the same category as the rest of the trial's achievements, similar to dungeon motif achievements.
- MoL/DSR/SE/LC/OC: It's in the General category of their DLC (e.g., Thieves Guild, High Isle, etc.).
Half the DLC trials have motif achievements grouped with the rest of the trial's achievements, and the other half (the oldest and four newest DLC trials) have their motif achievements grouped with the other motif achievements from the DLC.
Personally, I think the motif should be associated with the source content, esp. since that's how it's done for all the dungeons. So I would suggest moving the motif achievements for MoL/DSR/SE/LC/OC to their trial category. And I would also suggest moving the achievement for Celestial Style Master to Trials > General.