Last time I recall seeing Kent at an MCA show was around 2006/2007, but even then, the ordering of the sheets was the same. As Pete says, it was done quite a long time ago to help the "flow" of the judging process. We used to start in the engine bay, which didn't make any sense as the first thing on the judging sheets is to check the paint/interior/engine and trans codes. Some cars (like Shelby), don't always have a door plate, so it didn't matter for those classes, but there was a much higher percentage of non-Shelby to make the decision to re-work the ordering. Not only was this done to help the judging process flow better, but it was also done as a courtesy to the owner so the doors would only be opened and closed once instead of twice.
We never claim that we have a perfect system, which is why we hold judge's meetings every year and obtain feedback from members. We seriously consider all recommendations.