Different honey on frame

A beekeeper sent me this photo. They were concerned that something was wrong with the frame of honey. Looking at the frame, you can see different colors on the comb. Is there something wrong with this frame? Honey tainted?
 This frame has two distinct different honey's in the frame. Looking at the frame it is easy to see where one honey stopped and another started. There is a nice white comb at the top of the frame, but in the lower part of the frame the cappings have turned to a darker color.
 For an example the light colored wax could have been clover honey. Clover is white honey, very light in color and the beeswax tends to be light as well. The darker wax was a wildflower honey. This wildflower honey is a darker color. In this case the wax was a little darker when it is compared to the whiter wax.