A similar thing happened to me. I found a telephone book from 1990 and none of the phone numbers were accurate either.
Also, I rediscovered a stash of business cards I received from colleagues and business associates back in the 80s and not only were the phone numbers wrong, so were most of the mailing addresses (and NONE of the fax numbers worked!)
Why is this news? Contact information changes. Is it because "it's on a computer" that it is suddenly noteworthy?
(That said, I really miss the days of logging in anonymously to FTP sites to see if there was new stuff to download. There was always an aura of mystery and surprise that is missing from modern archives which very dutifully have change logs telling you what's been added and removed. And no nasty SysOp telling you that you've exceeded your download quota either.).