I did write: "(or maybe not)"
you are probably right, i guess this ow tix, is just a way of setting up a ticket, patented by the ow guys, however, as itinerary wise there is not a connection between missing a flight in south america, and being on time for a dme flight from a different continent.
actually, its probably safer to try to have a very short stop over so in case they do synchronise the chance is smaller on a short notice.
i realized that there are different levels of synchronisations, and the superficial ones happen often (say every 2 mins), and the throurough ones less (say every 24 hours).
you might need a little calculations to figure out between the different timezones to make sure they are very close in time.
they will ask you how you would get so fast from eg latino country to moscow.
they might not like the answer, but I'd say that i have an cousin that has the exact same name as me. (if needed we are born on the same date)