Complex sentence: Those advocating an Irish postcode system point out that many people living in rural (and even some urban) areas share the same postal address, particularly confusing when there are people with the same surname living at different addresses within the same rural townland.
Split into simpler sentences: Those advocating an Irish postcode system point out that many people living in rural (and even some urban) areas share the same postal address. This becomes particularly confusing when there are people of the same surname living at different addresses within the same rural townland.