Reunion, which is my gen. software, has different and much more obvious choices. Importing, you choose character set (Mac or Windows), "auto source", which I think tags each person/family with the existing source number you choose, "Auto flag", which I don't understand but seems to want to flag each entry that fits some criterion (like earliest ancestor, etc.). Then it allows you to choose whether to import ancillary info like burial, notes, etc. Exporting has choices like whether to export all data or just data you have marked, "privacy filtering", which omits emails, addresses, etc., "include sources", "destination", where you choose an ancestral file (don't know what that is) or GEDCOM 4 or GEDCOM 5.5, character set, and line length, and "submitter", which I never tried. Then you choose what ancillary data to include, just as with importing. The use I've made of the import/export function has always worked fine, although I really haven't done the testing you have. Steve