United States Postal Service

I can't tell you how many times I've checked a tracking number and had it say "delievered in/at mailbox" only to check my mailbox to find nothing. I call to ask what's going on, and always, all they say is "we'll look into it and get back to you". No one EVER gets back to me, but the package mysteriously appears in my mailbox a week later. Also, numerous times, received a slip for a package too big for the mailbox, so I go the next day to the post office to pick it up and guess what? It's not there. Next day, package is sitting outside my door. Why leave me a slip saying I have to go pick up the package, and waste my time, if you're just going to leave it at my door the day after? Why not just leave it at my door in the first place. And in my personal experience, all the clerks at this particular office are VERY rude.