How to display correct ios launch screens?

I'm having trouble with having ios devices showing the correct launch screen. When building an app to an iPhone 4 using launch images, the app is loading the iPhone 6+ splash screen instead of the one for the iPhone 4. When using the launch screen it loads the same image as the iPhone 5 and 6, and then the iPad-mini(retina) loads the wrong launch screen image as well. The app was made in Unity 4.6.3, but I tried setting the launch images manually in XCode6 before building to the devices. Has anyone encountered this issue before or knows of a fix for it?