higher score without FC, FC record disappears

[Novastar827]

I've been working on FC'ing lately, so I've been keeping a constant eye on FCs, and suddently the FC count went down after I was trying zelda remix on 2x, I had a lot more perfects and out of pure luck managed to almost FC it (still getting used to 2x), but missed the last few arrows, but I managed to get a higher score then when I FC'd it, and then the asterisk beside zelda on the level rank page disappeared, and the bar went down by one, now I'm guessing that isn't supposed to happen, and I'm guessing it's not a common occurrence since usually you have to at least FC to beat your old FC score,

I've FC'd it again, but the asterisk won't come back, I've heard you need to beat your old score to have the FC show up, but I've recorded several FC's on other songs with worse scores, so I'm not sure really what's wrong

I've also FC'd destiny with a higher score, and it didn't record today, so that's twice I've been screwed over today, I guess I'll have to remember to take screenshots of everything significant from now on, bleh