maya,
My advice was to set the update event to "Logged" on the publisher, and to transmit real time data. On the receiver, save the real time data. Use a "sync point values before" setting like 10 minutes, if you need to make the sync run every fifteen minutes that's probably fine, but you should get all the data from the transmission of real time data.
I would not bother with Fox's suggestion. I would not use a sync before time of 1 millisecond, just run the sync more often,