The invoicing dealio is so common it's not funny. I had a customer freaking out one time because the dyno i gave him was from a mustang and his invoice said tuning on a Dynojet......
Also Id wager that the on3 injectors are someone elses reflowed injectors. Bad injectors do happen, I'd also be curious if the tuner in the call was using the proper lats for said injectors or trying t use semans deka lats.