actions=(combat speed+1.0)
therefor in your pic 2.7=(1.8+1) 
yeah, i think it rounds up in the book and down in combat lol. Suffice to say you add one to your combat speed to give your actions/round, so it is working as it should.
Before patch 1.05 actions=combat speed, they changed it to up the pace, and to give melee a chance to get through the archer fire i believe 
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Ps: just to clarify, move points ("moves" in the book) aren't used in combat.
