Usually when the numbers don't line up it is because the speedo has been clocked. I have been told!!! That when you pull the pin that holds all the rows of numbers in place that it is very tricky to get them all lined up in the right orintation so when the pin is reinstalled they look original.
I have also been told!!! That to overcome this you take some tape [masking or black] and tape the rollers at the mileage so that they don't move, then reinsert the pin.
Hope this helps, That's all I know about the subject.
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