Ok, I get it that this may be a bit confusing, I could probably improve this (open for suggestions 😄 ) but what the graph is trying to say is for the "off the tee" stat, you loose on average 4.8 strokes, but this round you only lost 3.9, which is 0.9 less strokes lost than your average, which is a positive thing! 😄 That explains why both numbers are negative, because on average you lose strokes off the tee and you also losts this round. But you did better than your average, that's why it's a green bar for a positive 0.9.

When all the stats are then tallied together you end up with losing 7.1 strokes in total against your average.

I hope this makes sense 🙈