i would bet someone other than a khaki laid the eggs labeled Khaki..........they will hide eggs and other moving about can unearth them. Khakis dont lay tints eggs (even when first laying) and duck eggs are more a porceleon finish to them not the dull "egg shell" finish like chicken eggs. The oblong (1 oclock positioned egg) is more on spot for size and shape of a khaki egg.
(have had Khakis for 3 years, many clutches equalling thousands of eggs laid...............all were white