What is happening in my house?

So lately (the past few weeks) my door has been opened and closed to my room. I have no idea what it is. Like today my door opened and then closed by itself, I saw nothing, but my brother (who I share a room with) saw a shadowy figure. Also once our dog, a Maltese was in our room when his kennel is downstairs, but the door was still closed tight, like when we went to sleep, and no one was awake yet. So then I started thinking, and my brother when he was little had seen a fox faced, yellow eyed, robed figure in the room we sleep in now. He has seen what he thinks is his guardian angel before, it's a person in all white that glows, but only he sees it, it also seems to age with him. He also once saw a ghost in a hotel, it was a translucent figure that just stood still, he walked up to it and it didn't go away, and he had blinked on the way to it. Everyone in our house in Wisconsin is a believer. So I'm wondering if he can see spiritual creatures, and if you have any idea what might be messing with us in our room.