I get the quest ID from wowhead, click ok, set to world quest for quest type, ender the map ID, click ok, then click add. It adds it to the list.

Some of the quests keep the names as numbers, some turn into their names, some turn yellow. Don't know what these mean. Am I doing something wrong? Are these the correct map IDs? The tooltip points to a website that doesn't load.

Dornogal #2339
Isle of Dorn #2248
The Ringing Deeps #2214
Hallowfall #2215
Azj-Kahet #2255
City of Threads #2213

Although it would be even better to have a built-in option for Special Assignments.

Some of the quests keep the names as numbers, some turn into their names, some turn yellow. Don't know what these mean. Am I doing something wrong?

This is because WQA tries different methods to determine the name. But I would have expected that the same thing would work for all of them.

I'll see if there's an easy way to track them.

Are there also achievements or something for the assignments?

Not any that I know of. Just that the first weekly caches I get give keys. Be nice to know which ones are up and decide if I want to do those world quests then special assignment, or something else for weekly caches.

Looks like it works on the custom section once I do enough world quests to "unlock" it. Still wish it would work before that though.