Well, Bianca sure looks pleased with herself. No doubt about those two eggs coming from the same layer.
Two eggs in the same day from a hen is not all that rare of an event. It, along with many other variations in eggs happen all the time. The thing to be concerned about is that this becomes a feature not a bug. Two yolks released in close succession can have risks.
You need to keep watch that Bianca might show signs of being egg bound and deal with it early with supplemental calcium to get the two eggs expelled before they cause trouble in her reproductive track. You'll recognize she's having trouble if you see her immobile with her tail low and flat and maybe pumping her rear as she squats.
Right now, Bianca is young and her shell gland is healthy and producing plenty of calcium. The problem is one that would crop up later on as her body loses it's "beginner's luck". A yolk released in close succession can be thin-shelled or shell-less and more likely to get hung up. This may never happen with Bianca, but it bears keeping an eye on.