Except in a couple of very unusual circumstances the minimum number of cars needed to make a race “countable” is two. However, the racing field cannot be LIMITED to two. That’s what eliminates drag racing as a countable race. As long as the racing field is not limited to two cars then a two-car field can make things a race.

Regarding your question about the photos I’m going to say it might have something to do with your computer. They show up correctly on my system. You might be able to get a different result using a different browser, i.e. Chrome, Firefox, Safari, etc.