help with coal quality

Ok, need a little help here. I like to think I know a little about Coal quality, but TVN's announcement has thrown me a little. The intersection is great, no doubt about it, but what about the quality?

I was holding a fair chunk, but must admit I have sold out in the 8s because the quality worries me.

Hopefully someone can set me straight. I thought they were looking at the high 6000's for Kcal, but the raw numbers show 4000. Is it a case of all ok, or are they fudging the numbers by quoting the dry ash free number?

On initial glance, the Moisture looks high too???

Finally, don't compare this to CEO, as coking coal and thermal coal are miles apart. Like comparing Silver and Gold.

Would appreciate any help on this aspect.....