Hey used to work at that which shall not be mentioned for far to long. Those numbers in that app were always a bit of a mystery who and how they got there. And while discontinue dates couldn't be trusted as a frugal the start dates could. This is why items like wii and xbox 360 would be given these random model numbers. That way it was hard to find for nosey employees wanting release dates. Discontinue dates was more so we new just when we stopped carrying it after the fact. Sometimes it would even say we still carried old tech that wAs not true. Long story short don't make your peanut utter and jelly on this bread.