Many prophecies are soulish prophecies which are made up in the mind of man or woman. Frequently they do not line up with the Bible. Sometimes people prophecy just to be noticed. You have a responsibility to check out everything you see, hear or read by the Word of God, by the Holy Spirit within you, and by your intelligence. Otherwise, you will follow every wind of false doctrine.
Some prophecy is divination.
Divination is the false gift of prophecy. It has destroyed churches and ministries across the land. The prophecies are right on but the purpose is to control. The diviners want to take over the pastor, then the church, and finally the property. Satan has a counterfeit for everything that God has created.