Over the years I have shipped thousands and only recently have I begun to have issues. Ed/dawn already know, since I lost a $1500 box that showed up completely empty and then only 2 months later lost a few hundred dollars from another $1500 box that also got opened but fortunately this time the employee tried to return the items.
Because I am a postal employee, I have a unique inside view on how things happen.
The biggest thing first off is the consolidation of distribution centers. In the past, I would drop off a box, it goes to Lansing mi, is sorted and then straight to oak creek Wisconsin. Lansing was a smaller sorting facility without huge overhead conveyors and millions of boxes smashing into each other. Now my box still goes to Lansing but only as a drop point, it then gets tossed in a huge cage full of boxes and goes to Grand Rapids. In Grand Rapids it goes on a huge conveyer, it must go up a ramp. If a box is 25 pounds or heavier, the angle of the ramp is to steep to beat gravity so the belt spins under the box until over time the belt eats the bottom of the box, the box now opens and dumps 200 pen blanks on the line which spill out through the entire building.
Now imagine you know absolutely nothing about pen turning. You clean up 200 plastic squares, 1"x5", they colors aren't so vibrant, they are dirty, have saw marks, scratch marks, you have no idea what it is. Just looks like some kinda cheap arts and crafts recyclable. Your duty is to decide, is it worth $25 plus?? If your decision is no, the compactor is its new home.

I am not saying I agree because I sure don't, but I am telling you a fact of how it is. And if you have $1500 in acrylics, the profit margin after material costs is really pathetic, so you just lost at minimum $1000 plus your time making them.
Now, going to the mystery, this all relates. Lets say the opened item is deamed $25. Now a person will make an attempt to return it to its home. Put it back in box and re seal it. There's a small risk it goes into the wrong box if more than one box is opened. Ed says it was never opened and re sealed, so I don't know, but I know what I say happens.
As far as how you must fight for $50, and to buy real insurance costs a fortune, and several other customer service issues how they deal with things I could rant a novel!
Ps, Dawn, next time I have a box ready look for Buster Brown. (UPS)