Kyla, also you might want to throw some shade cloth (or any old piece of cloth) over that plant for a few days until it recovers from the digging up and re-planting.
If you have any Neem oil concentrate, I'd recommend mixing some up in a watering can and giving both your Phlox plants a douse with it. I've had some success against blight doing that here. (and your article mentions it!) We have every blight known to man in Florida.
