1. I vote that this looks like sunlight damage. One speaker placed in a spot that got a lot more sun than the other one. But that wouldn't explain the run on the finish - a second, independent issue with that speaker.
2. I think that Kevin Deal is neither the angel nor the devil as various posters have characterized him here. He is clearly very knowledgeable about audio and tubes. But I had an experience with UA that caused me to hesitate about future purchases as well. Looking for some 6DJ8/6922 tubes and Kevin had some 7DJ8 tubes that he claimed to be fully compatible. The words from that offer are seared into my brain: "Trust Uncle Kevin on this one." So I trusted, and bought, and of course they didn't work -- were destroyed in-- my BAT VK-3i. The story gets a little more complex from there since I did make the mistake of ordering a second set (different brand of 7DJ8 tubes, same claim on UA website) thinking it was a one-time event. Those blew as well. Viktor at BAT asked me why I even thought they should work. Kevin actually did ask me to send the tubes back and he tested and sent me back the portion of the order that were undamaged. But he never refunded me for the first set, which in my mind he clearly should have. So, experience somewhere in-between.
My take on the guy is that he intends to be honest and he is knowledgeable but if you veer from his particular logic stream he is enough of an ego guy to be difficult in that situation. I think it is more of a matter of learning how to "deal" with him if you want the benefit of his knowledge and products.