If you’re dealing with mostly straight roads, then a dual compound front makes more sense. You’ll be mostly on the center tread, so that harder segment is fighting “flat spot” wear. In that type of environment, a dual compound front should excel.
That’s normal wear for a dual compound front tire. The middle is harder compound and wears more slowly. As you transition from middle to side, the soft compound wears quickly at the transition. And you end up with the wear you’re noticing and as it progresses… bad handling. At it’s worst...