I was looking at some of the serial numbers listed in the thread about the greatest collections and noticed that for e.g. the 288 GTO the numbers are not going straight up along with the production year of the car. To give an example: Lauren 1984 has 52739, Obrist 1985 has 54235, but Matsuda 1984 has 55237. Are these errors on that website or did Ferrari go up and down with the serial numbers as the years progressed? Also I think they didn't build them one after another. There were only 272 GTOs built, but the serial number range spans about 5,000 numbers.