Based on the following, it appears on *A awards that 2 Open jaws + 1 stopover is permitted:
Two open jaws are permitted per roundtrip award. For example, you can fly from Newark to London and return from Paris to Washington Dulles.
A stopover is permitted on roundtrip award travel only. One stopover is permitted, unless otherwise noted. Additional mileage may be required for Saver Awards within the mainland U.S., Alaska and Canada.
Am I missing something else that would limit to 1+1?
TRRed