Precooked Salty Duck Eggs

I recently purchased a dozen cooked salty duck eggs. Upon receipt, they were not packed in any dry ice. They were in a plastic carton and each egg was wrapped in a sealed red wrap. After opening 2 of them, I washed the outer egg shells and put them in my steam rice cooker to cook with my rice. When the rice was done, I cut the eggs in half and noticed immediately that they were not the bright orange yolk as shown on the carton. The yolk was runny and had was a dirty yellow brown color and the part of the yolk that was cooked was not orange but a yellow brown color. I smelled the yolk and it did not smell at all but I ended up throwing them out as I was afraid there was something wrong with them. I have written the seller to inquire about this. Can anyone tell me if I received a batch of bad cooked salty duck eggs? Thank you.