Then, yes, Your Controls, if that is truly the case you are 100% correct in your complaint.
I'm not sure that *here* is the time or place to *make* that complaint, it should be at flying school level. Though I'm sure you are going to say that you did argue the case at the time.
How "two" people are charged for the same plotter (in this example) is an oddity. How did the billing department know that the offending article was there - and if the first pilot had already been charged for the "offence" then how can the second one be guilty of it too?
It clearly cannot be the second pilots rubbish if the first one has already been found guilty of leaving it.
This entire industry leaves me in despair. It's a complete shambles from the (so-called) top, all the way down.