The edging tool tines are completely flat, but check their website, as they're pretty proud of their tines, and the way they work!
With the cultivator set-up, here should be twenty tines on each side, in fixed double arrays, and there are some slightly bent, with about six or so with a serious bend at the tip. As Smud6ie says, they fling the soil about well with this set-up. The seriously bent ones are not opposite each other.
You can also use one set of tines on one side, and a single edging tine on the other, and cultivate the borders and edge at the same time! I spent a very happy couple of hours doing that yesterday, and it cuts out so much back-breaking work!