The listed yardages were not always accurate, and at some point they did a reboot of the card to get a more accurate record.
One example is the lengthening of the first hole in 1983. Instead of telling the players that the hole had been lengthened by 10-20 yards, they told them that the bunker had been moved. The scorecard yardage wasn't changed until 1999. My guess is that the guys who played there annually had a pretty good idea about what was going on.
The third hole is listed at the same yardage as when the course opened (350), but has had iterations of 355 and 360.
The sixth hole was originally 185, went up to 190 and today is listed at 180.
The 13th was changed from 465 to 485 in 1994 without any physical changes to the hole. It opened at 480. Today it plays at 510 after a new tee was built on land procured from Augusta CC in 2001.
The 15th had its official yardage reduced in 1981 from 520 to 500, today it plays longer.
For 16, my guess is that the reduction in yardage is the result of changes made for spectator flow between 15 and 16, including the addition of an access staircase to the grandstands by 15.
The rest of the holes have generally experienced a steady increase in length, sometimes as the result of extensive changes to the hole (like at the 7th) or by finding room for new tees (the 18th being a good example).
The front of the first tee used to line up with the door of the golf shop. The member tee still does. But the back of the tournament tee lines up with the eastern edge of the original clubhouse. You can stand on the corner of the balcony and have a perfect view of the tee.