In the case of Elizabeth (Belnap) Webber, her husband seems to be duplicated on FamilySearch. It would be nice to see that corrected but it's not really a problem for WikiTree. If I read the FS profile correctly, the second set of parents (Joseph and Esther) don't make much sense since they married five years after Elizabeth's birth. None of the sources on Elizabeth's FS profile relate to her birth or parents.
As for records, you are on the right track with the marriage record you found for Elizabeth and Rinaldo. Sources, the nearer to contemporary accounts and original records the better, are the key to resolving conflicting information. Profiles and trees on other platforms (and on WikiTree) are only as good as the sources they cite. I would leave parents off WikiTree rather than connect unproven ones claimed elsewhere. Otherwise, we only help perpetuate internet genealogy myths and errors.