It appears that the presented lingQs on the cards are the ones from my most recent lesson.
Is there a setting to have cards randomly pull from anywhere in the database?
It uses the lingqs checked on the vocabulary page. If you do not check anything, it will check automatically all lingqs presented on the page before launching the test. So if you select “Show: 50” - you will have 50 lingqs in the test, if you select “Show: 200” - 200 lingqs, if you select any SRS list - you will have this list in the test. I did not find a way to run the test for all linqqs in the vocabulary.
In the Vocabulary section you can sort your LingQs any way you like and then use any of the tests with the displayed list. If you use tags, you can further refine your review list using them.