My husband has been working at UPS for 21 years. He tried to go on road but because of his vision he was denied. However through many courts battles he was made full time in the building in 2000. He currently works a split shift morning loader and international auditing at night. During the past 11 years he was always treated as if having his original start date as his seniority(21 years ago) until now they are trying to say his seniority date is 2000 putting him behind a Partime worker in his night time shift. Does he still have seniority over the Part timer for an earlier start time because he is Full time?