So, the way things were explained to me when getting put on CA was they look at trends over the past 90 days. So if I missed a day in January but didn't miss again until let's say July it wouldn't affect my reliability but if I missed a day in January, February, and in March Id at the very least get coaching then a write up for the next occurrence. Now I hope a more experienced TM can correct me if I make an error. After your put on a CA, you have a window that if another occurrence happens it's automatically bumped up. For example, I was put on a CA for having a few safety incidents. Then two months later I scratched a rack while making a turn. I was put on a final the next week. I think it is called the critical period (90 days). If I did anything that compromised saftey then I'd be terminated. So, my thought in your situation would be they had you on final and didn't notify you properly. Then, when you missed again they terminated. I may have misunderstood your situation and if I did I sincerely apologize. I'm sure HR can answer the questions you have.