Took me long enough to figure out how to shrink the picture, here it is.
Also my contractor and I agreed to wait until the next good rain to see if we can find where the water is going.
I have a very small area (2'x5') that settled the same when my pond was dug last fall. It settled 4-6 inches. Contractor said it was the spot where he took out a 4" plastic drain tile. Contractor is going to pack it in with more clay we have leftover. He also stated he would redo anything if I ever had a problem. He has been really good to work with so far. Your not too far from me, I am in DeKalb County.