So to day was a great day, I was pulled into the office twice. one for performance and then again for a warning letter for a late air. This is my history. On Monday i was missing an air so i sent a message while i was doing my pre-trip and verifying my airs then i proceed to deliver only airs leaving the missing package stop for last. I got to the stop and sent another message saying that i was going to look for the air until 1031 and if i couldn't find it then ill resume to do my route, Its 1031 couldn't go thro the whole load but sent a message that ill resume my route, about 20 minutes later there was the air mixed with a bulk stop on the RDR. So all of the sudden today after i sign 4 grievances and my steward handed them to my manager the guy decided to say "oh btw im giving him an warning letter for the late air, because he failed to communicate me that he was missing it" . i was told this when i got to the office so i tried to explain to him that it was not my fault that his team failed to relay the message to him. in fact the 3 messages i sent. He still saying he is giving me the warning letter so i told them i wont accept it and i want to fight it. Now he says he is gonna pull the past 3 years record of the route i just won the bid on to prove that im doing something wrong. This is a clear example of over supervising and harassment clear violation of the article 37 i believe it is. or am i wrong? now question is every manager really this dumb?