They also differ in tradition, organization, ritual, and opinion as to what gods to honor. For many, the contradictions are not a problem. Listen to your intuition. In other words, feel free to pick and choose among the published rituals and ritual textbooks to decide what feels right. For those who recognize the nature of truth, such contradictions are a problem.
Truth is fact, that which is real.
Things are not true simply because a person feels or hopes or believes that they are true. For example, at one time doctors believed that they could cure pneumonia by cutting a live chicken in two and laying the pieces on the patient's chest. Doubtless, many patients sincerely believed that this treatment would cure them. The Bible claims to contain the truth about spiritual matters. Many who practice witchcraft do not agree.