Fixed Very insignificant goof-up with the ERZ3 waypoints

In ERZ3, there are two identical boss waypoints on the middle platform. If I delete it, the map functions as it did before, so I assume somebody's hand slipped when making the stage. Although it doesn't hurt anybody, that second waypoint is unnecessary, so I thought I might as well report it.

While I'm at it, why does the Sea Egg use the Angle for the waypoint sequence while Brak Eggman uses the Flags value? That makes no sense. Make them both use the Angle.