Random meetings 2 weeks apart

In the early 1980's we had just moved to Australia from the UK and decided to go to the first day of an England v Australia test match at the Sydney Cricket Ground. We were quite late taking our seats and the ground was pretty full (it holds about 35000 people). Just after sitting down I heard my name called from just behind and there two rows back were a couple that we had shared a flat with, briefly, in Bristol 5 years earlier but had not kept up with since. So far so co-incidental! We had a brief catch up and exchanged addresses and said we'd keep in touch. Two weeks later we were in Canberra attending a wedding on the Saturday and, with time to spare on the Sunday morning decided to visit the National Gallery. We joined the queue at the ticket desk and who should be standing just in front of us but the couple we had seen two weeks previously at the SCG. They had decided last minute to spend the weekend visiting Canberra. So even if we hadn't bumped into them at the SCG we would still have seen them in Canberra two weeks later (or would we? Would our lives have taken EXACTLY the same path had we not met in Sydney?)