Where does it say that?
this:
-You won’t have to use more miles if you change the operating airline as long as you stay in the same class of service and the same region.
-You won’t have to use more miles if you change the origin, connecting, or destination cities as long as the origin and destination cities are in the same region (US, Europe, Middle East, etc) as you originally booked. However you can’t change the class of service or operating airline in this case.
now if i fly nyc-tlv through Europe and i change airlines that automatically changes the connecting city so that should resunt in a reprice. i wont get swiss or turkish out of the same connecting city as LH. where did i go wrong?