Jack of Clubs
Why is there no Word Games Forum or Subdomain?
There should be a Word Games Subdomain, or at least a Word Games Forum!
The reason this strikes us as odd is because you're basically putting a colony in Blue's system, but not even attacking the player whose home system it is.
So? What's so odd about it? That's where you sent the ships, so that's where they land. There's no reason the ships, after winning an attack in the blue system, would somehow wind up in the yellow system.