I can't open your file. How about copying it and including the pertinent information in this thread.
Mottling must come from both parents, not just from one side. Yes it can hide and not be visible in a parent that has only one copy. Yes, the chick look to be mille, but you won;t be able to tell how good it is until the bird has adult plumage.
Best to not use abbreviations that are not standard; it makes communication more difficult.
Unless the two lines were crossed, the RIR side does not carry mottle, so that trait will disappear in adult feathering, and they will NOT be mille fleur.