Newbie to Alaska awards and am stumped. I'm looking at partner awards all on AA metal (using Alaska points) and see availability separately for STL-LGA and JFK-FCO, but when I try to book STL-FCO, it forces a stop in DCA or PHL or CLT. I presume this is because there would be an airport change in NYC (it's a 12 hour connection though). Is there any way to force that award other than booking multi-city and paying separately for the segments?