Congratulations! Double Yokers are like a Christmas Present!! Wahoo!!You are right it is double yoked!. Quite excited about that! And dark yellow yokes, also the eggs are the same color. Should I be concerned that she laid a soft shelled egg yesterday? This was be her 5 th egg to lay.
Don't be worried about the soft shell but make sure you are providing a bowl of oyster shells.
Her body is still trying to figure things out. She will eat the oyster shells if she needs it.