To me, except over longer periods of time, your score will, and should not change much. It should not be measuring your mood, it should be measuring your deeper attitudes and core feelings, and good tests will do this if you answer from you real beliefs, not being effected by your current up or down. An especially good test will even be able to decode your current position by balancing out "high" questions with "low" questions so that you end up coming our with about the same score either way. Your current mood does not define you as BP or not BP. Also remember, many of the different conditions overlap. The "sanity score" test, for example, combines the many different tests. If you test high on one, you may test high on half of them.

I for instance test high on probably most of the tests. Even though I have more than one condition, I do not have all of them. I am BP I, I am GAD, I do have Social Phobia, I might be BPD, my docs don't care on that one as the other treatments will cover that as well. The sanity test claimed Coping, Depression, Anxiety, Phobias (multiple), Self Esteem issues, Schizophrenia, Dissociation, Mania, Relationship Issues, Physical Issues, Technology Issues, OCD, PTS, BPD. That means I should be tested one-on-one for those issues, not that I have them.

A good Doc will ask the same questions over and over, in different ways. My first one did not, they only asked the standard questions and everyone knows how to answer those. They said I "only" had GAD. The second asked the questions more subtly. After I said no to risky sexual behavior for instance, then she went into my specific thoughts and behaviors. The answer then became yes. She did not hesitate to declare me BP, and throw out the OCD that the first Doc and tests say. The tests are just for screening though.