So apparently this is my second misload when they tested us without us knowing they put changed the labels. And after the second one, the supervisor said we won't have this talk again about misloads and I agreed. Next thing I know, the supervisor has the union rep bring me a warning letter over a misload. WTF. If I was just given a verbal warning how can it just jump to a warning letter? When I asked if I was the only one they said no and had given other people warning letters for a misload. Is there a way to grieve this, especially since the second case was one where I left for break and came back to see the boxes rearranged?