Making a class trail unlocks the armor appearance for your account however, some appearances are not being counted in ATT.

--Bloodcaked Runeblade

Tried refreshing the collections but it did not work.

Addon settings:

hopefully I am just missing something.

Hm, can't reproduce Class Trial hunter helm, correctly counts in Unique Appearance mode for me (checked the one in the Party Sync box specifically).
Something weird with DK sword.

Double checked regarding the hunter helm, it is now showing as known, still nothing on the dk sword.

I've investigated it further and from what I understand the situation is like this: Bloodcaked Runeblade (173566) is not class locked, however Heart-Lesion Runeblade (153747) from Class Trial IS class locked. You can't unlock universal version of the blade with the class restricted version, that's why it's showing as not collected.

I hope this explanation helps.

P.S. If you have Account Mode OFF and "I only care about my main." ON the blade will correctly appear as collected.