Yes "data was changed". But in specific ways. The same ways that "data" was changed that allowed man to get to the moon with a back pocket calculator. The same types of way that data is changed that allows your cell phone to work.....

How do I know that about the cell phones? Because that's what my ex got paid to do for two years of his life.

http://asq.org/training/black-belt-quality-engineering-statistics_BBQES.html

I don't know what project he's working on now, but "changing data" is exactly what he gets paid to do.