well, there isn't much info on BLW and FF, because the research group were all BF.
however, i formula feed, but i have always made up feeds that i reckoned she wouldn't finish (ff on demand). i would say that is the way that makes sense if you are BLW (or weaning with purees, for that matter) as it allows the baby to control their intake.
so to be honest i'd start making up an extra ounce or two in the bottle at each feed, so that the baby can indicate what they want. (you might be doing this already, so ignore me if you are).
basically offer as much food as they want, and offer as much milk as they want. it's the closest thing to them managing their bfing, in that respect, and hopefully lessens the chance of obesity in the future.
so to look at your example, yes, i would offer more, but it's actually quite difficult for you to guage how much solids has been eaten, so i would always offer more, iykwim?
not sure i've explained that at all well...