Defense spending has increased (not really doubled, though, according to those numbers), but much of that increase was poured down the drain actually making the war happen. Defense contractors' profits probably don't scale linearly with defense spending in times of war.
At the bottom it says that these figures don't include the costs for the day-to-day expenses of Iraq or Afghanistan. Those costs, if my cursory Google search is to be believed, are around $9 billion a month. All told, that's about $600 billion a year, or twice the "peacetime" average of $300 billion.
