I'm digesting the manual and I can't work out why one particular staff cost situation is.
The staff cost chart on pg 142 shows a Arty Platoon cost of attaching to its Brigade HQ and Division HQ as 0.25.
Why is this not 0.50? According to the rules:
1) Its indirectly subordinate to both units, causing 2 points.
2) Its more than two levels smaller so this halves to 1 point.
3) Its not line so its halved again to 0.5 points.
I know its late (for me in the UK) and I'm probably missing something obvious, but the other costs make sense to me.
Can somebody clear this up for me please?

