Junior Cook is doing anything but cooking

I found that I had to frequently tell a dupe to move away from the microbe musher multiple times before my cook would finally decide that it was time to cook.

Try to remove every one else from the job cook in the jobs menu. 

Yeah as long as others can still do the job if they reserve it first the cook will not kick them off of the machine. Not exactly a bug but maybe poor implimentation? Other jobs have the same issue, I think as well as disabling everyone from doing one job like cooking you should have the cooks only be able to cook XD