When I did the fire scene for Under The Tartosan Sun I had lots of fires rekindle. But I did have a lot of fires going at once too. Sometimes it would be the fire they just put out, other times it was another one all together. There is a limit to the number of fires the game will allow at any one time. Most will fizzle out fairly quickly if you just let them go and then one will ignite somewhere else. By the time I called in the fire department at the end, while they put out the last fires that were still burning one of the others that had fizzled out on their own reignited. So what may have happened was there were more fires than the game could show, sort of like a hidden queue of fires. Once a fire you could see was put out, the ones that were waiting ignited. Just a guess.
