The withdrawn double yellow was because the #24 FC car spun in 17, blocked the track, and could not refire. As soon as the double yellow came out, it refired, and he drove off. While probably against the rules, to pull in the double yellow, I thought it was a good call by race control. I expect the few drivers (with radios) who lost some time would prefer the "nevermind" to another full course caution.