I'd suggest looking at the example that comes with MagiCam when you download the plugin, because you seem to be misunderstanding how it works.
1. You shouldn't use the "Scroll To" behavior when using MagiCam.
2. You need to tell your MagiCam camera which objects to follow using the "Follow object" action.
3. You need to enable following for your MagiCam camera before it will follow anything, using the "Enable following" action.
EDIT: For the knockback problem, keep in mind that your Enemy object is following the Sprite object, not the other way around. You need to position Sprite to the location of Enemy at the time of knockback to get them both positioned the same.