Kory - A very unusual dream, and I can only give you helpful leads. You see dreams come from the process of life within us, and the life within us is ancient and existed before words, so you may only get hints from words.
The haunting suggests that something or someone existed before you, yet you found that the signatures were all yours. So you may not previously believed that older lives than yours are influencing your present life, but please see
http://dreamhawk.com/dream-encyclopedia/the-conjuring-trick/ and
http://dreamhawk.com/dream-encyclopedia/reincarnation-and-dreams/#ReinProof To explain the symbolism of your dream further you entered the basement which in dreams is like going underground below the surface where ordinary life takes place - the unconscious, the place of sleep and dreams, which is another dimension of experience than waking life. See
http://dreamhawk.com/dream-encyclopedia/the-unconscious/ In the basement your field of awareness as described above in the unconscious is enormous. From that you realise there is a stairway to a place you had never been before - the attic. There, in that even vaster view you find traces of a previous dwelling and dweller. This is sometimes called the superconscious, but is a factor in what is usually unconscious to us. There you met an influence that I believe felt like a different being, but was an influence entering this life. Why it had such a strong influence I don’t know, although if you read the conjuring trick you will see how.
But there is a big clue in your dream, the hole hidden under the carpet. In dreams it suggests things about the way we have lived that we do not wish to acknowledge. Things we have pushed out of sight without dealing with the mess. A hidden place within us.
But the hole indicates there is a room, a ‘past dwelling place’. In other words old ways of life or even past lives. It is worth exploring the hole by using
http://dreamhawk.com/dream-encyclopedia/acting-on-your-dream/#BeingPersonGood luck, for if you managed to use the technique well you will begin to understand the mystery of life.
Tony