I'm confused as to how the STAR and landing runway are being chosen by PF3. I'll use my previous flight (KATL-KSEA) as an example. When inputting the STAR name into PF3 (in this case it was CHINS3), I alter it so I know which runway I'm being assigned to (so I change CHINS3 to CHINS6R for 16R for example).
As I approach PDT VOR where I transition into the STAR, ATC clears me to fly CHINS4L for runway 34L. As I reach the end of the waypoints in my .PLN file, ATC then clears me to final for runway 16R. This is where I'm confused as to why I was given a STAR for a completely different runway to the one I'm landing on.
I use the ActiveSky Next weather engine, and this situation happens with and without the ATC wind lock activated and approach downloads suppression activated. I understand that without the wind lock, the runway selection can vary. In this flight however, I monitored the wind at KSEA throughout the flight and particularly leading up to the transition into the STAR, and it remained a decent headwind up the 16's so I'm wondering why I was given a STAR for 34L.
Am I missing something that I should be doing?
I've included my logs folder.