This isn't an issue of age, it's of misrepresentation.
I'll try to put it in a way you might understand:
Let's say that a seller lists a suit. Let's say that in the picture it appears to be a 3/2 Roll. Do you still question the seller to make sure it's a 3/2? If you don't, and you buy and it turns out to be a hard 3-button, do you have a case of an item being misrepresented, or did you do something wrong?
This is perhaps an over-simplification... Again, I don't expect anyone here to know the difference between a leather chamois and a synthetic chamois, just know that the Assos shorts of 20 years ago are not of the same quality and comfort as the modern ones.
Obviously, the seller has recognized that he/she is partially at fault, and has given me a full refund. I will be shipping them off to jolly old England later today.
Yes, I've learned my lesson about reading the listings. And yes, I did report the seller for violating TOS. It may not be the direct issue here, but it is an issue. I should have noticed that and not bid on the item in the first place.