HELP! Oxidized KitchenAid stand mixer bowl?!

I just purchased a KitchenAid Professional 6000 HD stand mixer. I made a loaf of bread and then started on my batch of cookies while the dough was rising. I noticed when I was scooping out the batter that there was a black/dark grey substance coming off of the bowl onto the batter. I quickly scooped the rest of it out of there and then proceeded to wash it. 

I was reading on other posts about the dough hook doing this, but couldn't find anything about the bowl itself. I tried calling the 1-800 number but of course they are only open Monday thru Friday. 

If anyone has any solutions or if returning it is my best bet. It says in the Instructions manual to not return it to the store. What should I do?

Thank you!