Sorry I don't know the answer, but if someone knowledgable answers you, could they please also tell me how do practice runs treat rank. Does it assume it's maxed? is it halfway? 0? Does it record your rank when you actually got to that stage on a regular playthru and use it for practice?
I'm wondering cuz sometimes I practice a level alot, and ace it, then I do the real thing and omgwtfpwnedbbq!!111oneoneeleven (sorry I just love making fun of that line lol).