Picture #3, with the 2 colored cappings....interesting!
That isn't actually honey that you are seeing there, that is most all capped brood. The reason for the two colors is because the darker cappings are probably the first batch that the queen layed in the first comb drawn, those ones are darker because they are closer to hatching, staining their cells and spinning their cocoon.
The lighter patch is actually newly capped brood, they haven't drawn a cocoon yet and stained their cells. That comb took a little longer to draw and the queen didn't get back there to lay for a little while.
You won't see this on older comb since it is all stained dark already.
Looks like they are going gangbusters!