The point here is that it's all based on guesses at this point. There is absolutely no solid link here. We're just assuming that the same chips end up numbered the same way reliably, and we have no way of knowing if that's true. If it were, the numbers wouldn't represent packaging times but would instead be linked to chips themselves. Especially considering that they have mixed batches, I really doubt the same dies end up with the same numbers all the time.

Just to be clear: It's not that your idea is conceptually difficult to understand or that I don't get it. It's just that you cannot properly draw that conclusion with the information we're given.