Not sure if this helps at all but....
About the eye thing, I had a similar problem with my mother's chinchilla. At first we freaked thinking fungus, conjunctivitus, etc. Took him to the vet, got eye drops......it cleared up somewhat. Then it happened again. Got eye drops, repeat, etc. You get the point. The long story short is, after multiple vet visits and treatments...and some careful watching of his conditions, we concluded that our little buddy has.....a sensitive eye.
I know, it sounds weird. But one of his eyes (just one) would tear up under stressful conditions. Occasionally, a new hay or dust might make the fur look a little weird. He's quite settled into his home by now, but the fur around the eye never looked.....right. Not fungus, I've seen that in chins. It's definitely not an infection. One detail to this story that is important is that he is a white mosiac/violet. And quite the small midget boy at that. I wonder if weak genetics has something to do with his eye issue? He's quite fine now, going on 6 or 7 now I believe? And this is an issue that we've just come to accept as part of his cute charming personality.
Just thought I should share this story. Not saying you shouldn't get it checked out, and do pay close attention to his condition. But I wouldn't freak out and get upset about it. If it's a fungus/infection it can be dealt with. If its the chin, well...love that cute little fur ball just the same. Love the pics.