Why does the Activity app not use Nike Training calories

There seems to be a massive discrepancy of the Nike Training Club app and the Apple Watch. I'm not sure if this is the devs of Nike apps, or a restricted integration on Apple's behalf. But even the basics I find so strange that have been supported.

The NTC app seems able to transfer information from app to Health Kit and then from Health Kit to Activity app, but it only seems to use the data of Exercise time from the app, to help move the Exercise ring. The info of Calories is also present, but isn't used towards you Move ring, why is this?

After burning over 100 calories, only for it not to count towards your days goal, is a bit disheartening!!

I know you can start the workout app on your watch at the same time as your workout, but then you get double Exercise points.

Hope this can be fixed sharpish...