The Post Office....

Why is the post office so darn frustrating? I just moved into my new house...prior to that I received mail at my parents' house, the skydiving dropzone where I work/lived part time in an RV, and my post office box. I've continued to receive mail at my parents' since we own a business together and I travel quite a bit so there are some things that they take care of while I'm out of town. I've been getting mail at more than one address for 4yrs (I've even had stuff mailed to friends I was visiting, when I've forgotten things). Now that I've moved, I've tried to have a few bill sent to my new house. Apparently I can't do that without stopping my mail from going to my parents' house and the dropzone I work at. But according to the post office, I can't stop the mail from going to the dropzone because it's a business address and I don't own the business. And I really don't want to have all the mail that goes to my parents' house forwarded, since some of it pertains to our jointly owned business, and some of it is stuff that they handle while I'm gone. But according to the guy I talked to on the phone, I can only receive mail at one address at a time...I can't just expect the post office to deliver mail wherever it gets sent according to him. Only one address per person, he says. I really didn't think this was going to be so hard...