*********** and unfriendly manager

I have allergies, so I ask the manager for two burgers with no mayo on. She tells me there is no mayo on the burgers. I ask what sauces does it have. She tells me 1000 island (main ingredient is mayo) and bbq. I ask her for no 1000 island sauce. My burgers come with another sauce other than bbq on. I tell I can't eat that sauce. She starts arguing with me that I didn't specify no Rave sauce. I tell her she told me there was only bbq and 1000 island. She reluctantly remakes me the burgers. How does a manager not know the ingredients of the sauces as well as what sauces are on the burgers. And why does she come to work grumpy when she is customer facing.