There are three, and the three are One and the same.
redundant....Father, Son, Holy Spirit can each be called LORD/YHWH, but that does not mean they are the same. Spirit of Christ can refer to the Holy Spirit, but that does not make Him Jesus. Many verses show personal distinction, so your Spirit, spirit, Christ verse must be interpreted in light of this. There are various names, titles for the Father, for the Son (different than the Father in many cases), and the Holy Spirit. This shows their distinction vs same in every sense without compromising their common nature/oneness.