You are down 2 preloaders, everyone else has to try and get all the trucks loaded, and the drivers get out late.
Late air that day. Next day the bosses don't want excuses, they want to know why there was late air the day before. You were down 2 preloaders? Why did you let them take the day off? It is YOUR responsibility to have full staffing, you are to be staffed 100% every day from this day forward! If you can't motivate your employees to show up every day, we will find someone who can!
Also, being one of the newest in management ranks, should there be cuts made, you possibly would be one of the first cut. Might be you could accept a PT sup position due to cuts.