What is said here, in similar words, is :
On Leg #02 POI15, starting from and currently at waypoint #01 AINSA, we have to follow course heading 342°, until we reach POI15, during 30.31 km and it will take 7’ 47" until leg end at POI15. Then come some explanation : “From Pico Posets (lets assume it’s at AINSA), turn towards a new location, which is at the southwest of the tiny hamlet of Plan and is set amid spectacular mountain scenery.” … Here it’s not said to turn to the southwest, but rather to the southwest of the described location, so still on the 342° course to reach this location, as we’ve already read in the POI15 line.
All of this requires indeed, a bit of practices and attention, to properly understand the requirement and set the aircraft accordingly on each leg. Perhaps not really obvious, however once we get it properly, each leg info will appear clearer.
[EDIT] :
Just an important point, it looks like the Flight Plan explanation differ a bit, as we read in the screenshot below, with last applied update, though this doesn’t change anything on the way we pick info in the NAVLOG
