ExplorOz Traveller (Web) Trek Creation Pre Planning

I am a rookie at the ExplorOz Travller (Web) version and Trek creation process. I have watched the youtube videos posted by David and have successfully created some personal outback treks. However, thinking I was proficient when I am actually NOT, on some parts of the map (using EOTopo 2021) when I create a trek (yes I have added my points of interest into a folder) when I get it to recalculate from straight line to say driving in Navigation mode, rather than simply taking the shortest and most obvious line on the map, it creates a trek for that part which goes the very long way around which makes no sense at all. For example, the 2 points of interest may even be on the same track on the map yet it creates the trek backtracking and going around a different track altogether. What am I doing wrong? Thanks for any comments/advice.