Here is your simple answer. First, things first, finish your air. Don't give UPS a reason to fire you. Second, and this is the most important part. CALL YOUR CENTER!! The quickest way to get in trouble with this company is to use your brain. Don't do it. From tiny to huge, let management make every decision. Problem with a customer--like yours--call center. Misrouted NDA on your truck? Call center. Dog chasing you? Call center. Wondering if you should DR a package here or there? Call center. Call center. Call center.
Stop banging your head against the wall. I see this with so many drivers today. Understand that common sense and logic are not a part of your job. In fact, it can get you fired. No, that's not a joke. Ask anybody here who has at least 15 or 20 years seniority. I'm surprised you haven't been told this by a member of management before. Usually when something goes wrong and you try to do the best you can to amend a situation. Afterwards, this is when they will tell you. "We make the decisions."
I've been told that a few times. The last time I was told that, I took it to heart. I now drive every member of management nuts with my calls and messages. Do I really need to? No, most of the time I don't. But it the 100% sure-fire way to avoid trouble. Let their stupid decisions sink the ship. Because they will. The end result is that you can always shake your head, and say, "Hey, glad that wasn't my call."
Embrace the idea that you are a monkey with a number and a name tag. You will make a lot of money here if you do. UPS will say they want you to make your own decisions. Until they don't. Save yourself the trouble and let them make all executive decisions.