That's my read on it, but time will tell. Some have thought that the triangles look more like swords, so in that case the squares would be either staves or flasks. That thread has a lot of information on the Corellian Spike deck, which is very interesting.
And thanks for the tip on how to send a person to the right place! As I'm kind of new here, I appreciate all the help I can get!.
As to the Falcon-winning hand, if the thread I referenced is correct, it looks to me like -7, +4, -4, +7.