Which cut line is correct? Don’t know, both sides are screwed twisted beyond belief. This is the start cut, the first 2.5" inches are for kid’s projects… Another chance at loosing a finger or two. The worse part is that these were the best picks of the day. Every other 2X6 (1.5x5.5 for the non-retarded among us) were worse splintered, bent, twisted. They need to dry the wood slowly in a well spaced stack. I wouldn’t wish any of this wood on anyone for anything.
Note that it will warp further when you get it home since Home Depot wood is unlikely to be fully dried and the environment in your home will be different as well.
You’ll need to wait a couple of weeks to see what shape the wood settles into. If you try to build something now it might end up warping after construction.
Even if you’re working with S4S lumber you still need to let it acclimate and then finish milling it if you really need very square pieces.