I started a new term and cloned in courses from the current term. It seems that tests become linked together such that one cannot edit a question in the new instance without it affecting the current instance. For example, if I am in the test and choose to edit a question, it limits some of the fields because the question is on more than one test. The other test is in the other instance (last year).
In order to help the course instances evolve independently, I'd like a way to copy the tests into the new instance with a completely independent set of tests and test questions. That way, as the lessons evolve, so can the tests.