The FAQ says that the ONE allows four segments per continent (except for the continent of origin). However, the itinerary planner only allows four sectors. And the fare rules state that it's four flights. I'm a bit confused by all this.

I would like to fly YYZ-TLS which has a transfer in LHR-LGW, for one sector (not including first intercontinental flight). I would then like to go TLS-DUB, which has no direct flight in the off season, for another two sectors. This means that I only have one sector left in Europe, which I would need to use to get to a major hub.

I don't plan to stopover (>24h) in any connecting cities.

So does this mean I only get to visit two cities in Europe on my ONE fare?