Sorry for not being clear on the spawning.
When you hit multiplayer and the first thing you see is a plane. It will either come up as an allied plane(sopwithcamel) or a german plane (red Tri-Plane). After a game ends and you hit the play again button you will see a plane again. This will be either allied or german. If you bought the red-tri plane you will have spent the coins you had. If you are seeing your german planes and do not see the re-tri plane, there should be an arrow pointing to the left or right. These arrows will let you scroll through all the planes available to you and in the future.
When you are in a game you will always be blue and your enemy will be Red, does not matter if you are allied or german.