Hello, I'm not sure if this is how it's supposed to be but at the Daytona Oval, it's possible to go below the double yellow line and still set a valid lap. At the Start/Finish line it is not posible to go there anymore but for the rest of the lap, people can still go below the yellow line. I just found out when setting a time with the FR US car. If this is not how it's intended to be, it is probably also with it, to clear all Daytona Oval LBs.
Technically the oval is unsupported (as is the indy oval) which means its unlikely this will change and nobody knows if its intended or not. But who knows, maybe youre lucky and someone still has a look at it. Otherwise youre just gonna have to go below the banking in cars where its faster or choose immersion and accept some time loss