Not sure what you're asking here, can you explain further?
I use FamilySearch matches to support profiles quite extensively, but you do need to ensure the right person has been selected. That normally involves building the family on FS first, taking care that birth, marriage and death records for all members are consistent. Where there is inconsistency (say, later children born in a different place to earlier children as an example) some proof that they moved house should be found via Census records or similar.
A red flag for me is a family with members born all over the place, or a family built with no proof of the mother's surname, or a missing marriage record.
Does that help at all?