The guy who parks trucks in my center is a 22.2 job. Whenever someone covers his job when he is off they make his pay rate (unless they are making more with their normal rate) for the evening. On a nightly basis, I work 2 hours (hours 3-5 of my pt shift) parking half of our centers trucks for my rate. It's not likely they would ever give me that extra pay for the 2 hours I spend directly doing the job he gets paid double for but why is that? Is there a reason that they differentiate between the two?