CAM phaser replaced and is now leaking oil?

Should any leaks have been fixed or should any leaks have been found when the phasers were replaced? I began smelling oil and then the ticking sound when starting the motor every morning. Ford says that it’s the cam phasers. I had the cam phasers replaced, and now they tell me after I began to smell, even stronger smell of burnt oil, that rings and all kinds of stuff is going on with the manifold and stuff like that. They’re saying that they now have to replace the cam phases along with all these rings.