Hello. On thursday last week i worked from 0810 to 2227 hours, yet i was back in the building by 2208 thats 2 minutes before the 14 hours DOT. on this paycheck i noticed i was missing about 20 minutes overtime and after going through my time card with the pm dispatcher i saw that on the same day my start time was changed to 0830. Outr dispatcher was on vacation last week so i dont know who did it. This is not the first time management has change my timecard in fact this is the 4th time in the last 2 years, i spoke to my Steward and he said he is going to take care of it. Yet ill like to know if there is something else to be done. I really dont appreciate being pay 3 or 4 weeks later thant when it should had been. Its this even legal?