So for some reason there are two levels of Full Combo: one where you can't have a miss (and bad from what I've read but I didn't confirm myself), which gives the x star FC medal, and then theres the one where you can't have a good and below, which gives you the "perfect" text on the performance line thing. Why is that? Is it a bug or a combination of the Stepmania and osu!mania combo system where Stepmania goods/100s break combo?