In a previous posting, I noted that the three-point arc for men's and women's college basketball was now the same, as the women's distance was brought out to match the men's beginning this season. Some courts still have two arcs, however, which I speculated may be because those arenas host high school tournaments and thus continue to need the inner arc.
The Charlotte 49ers' court has a unique approach to retaining the two arcs, namely painting in a solid zone between the two curves. The court is shown below (as captured from this highlights video).
I suppose this set-up might make it easier for referees -- either in a college or high school game -- to keep track of whether a shooter's feet are behind the applicable distance.