-snip-
Your interpretation is flawed. It only counts towards the next addiction test if you use during that week. This is supported by the text saying that the weeks "don't need to be consecutive" + it also doesn't make sense that your risk for addiction would progress during weeks you don't use. So it would be:
Week 1: You use Kamikaze.
- Start the addiction period. (no need to "reset", since you always start at the base value).
This counts as the first week of using Kamikaze for the addiction.
Week 2: Don't use.
- Threshold drops from 3 to 2.
Week 3: Don't use.
- Threshold drops from 2 to 1.
- You're almost there!
Week 4: You use.
- Damn! You were so close!
- Threshold resets to 3.
- Since this is the second week you use in this addiction period, and Kamikazi only needs two, you make an addiction test.
- If you fail it: You gain Addiction (Mild, Kamikaze). (or it progresses one level) The current Addiction period ends, to start from week 1 again when you use next.
- If you succeed: Keep going.
Week 5: Don't use.
- Threshold drops from 3 to 2.
Week 6: Don't use.
- Threshold drops from 2 to 1.
- You're almost there!
Week 7: Don't use.
- Threshold drops from 1 to 0.
- You're in the clear! Addiction period ends and you have suffered no negative consequences.
This both makes sense and follows a literal reading of all the rules.
My understanding of the addiction rules is this:
Take a hit of a drug. Start the clock: for the next (11-Addiction Level) weeks, each time you use that drug again, you must pass a physical or mental test (or both!) with a threshold based on the drug.
Nope. The (11-addiction level) is how many weeks you must use in the addiction period to be forced to take the test. In your ruling, stronger drugs actually have a shorter time period where you could have to make a test to resist... When you do make the test, you have to beat the drug's full threshold. (since it resets when you use it) If you let the Threshold hit 0 by not using for an amount of consecutive weeks equal to the Threshold, you'r eoff the hook and the addiction period ends.
If you use again after that, you start back from week 1.