I did not realize this at first until I looked at my receipts but the exact same package was charged 2 different rates at post office.
On Nov 18, I got a small package in a post office box from NJ that cost $5.85, according to the label.
I got the item, painted it, and shipping it back in the exact same package, to the exact same address, but it cost me $6.85. I asked for the cheapest way to ship. No extra insurance, tracking, etc.
How could the same package going the same place be exactly $1 more? I looked at the USPS website for any raise in rates that could have taken place, but found none. I do not have the exact weight for both shipments, but I can't believe simply painting this object would increase the cost. Especially by exactly $1.
As I was standing in the post office, one thing I noticed about people needing to mail stuff. The post office is confusing. First class, priority, etc., is so confusing. At least 3 of the 5 people in front of me asked the same question, "What's the best way to ship this?" When you go to UPS it's a simple, cheapest is slowest, and the faster you want it shipped, the more you pay. With the post office, it's one price for this, another for that, but it's not guaranteed "exactly", but should be there. It's insanity. The post master general should stream line the postal rates and services and at least try to turn the current financial disaster of the post office into breaking even or at least not losing so much money.