You can't see it at all. Your flannels are absolutely beautiful. Is it possible you did have enough fabric but if you prewashed flannels are notorious for shrinking.
I too am guilty of buying fabs for quilts that sit in my stash for years before I make them into a quilt and yes I have also ran out of some. My problem is I constantly modify patterns or don't have any to begin with just pick block designs I like and build out from there.