If I understand you correctly (let’s just look at one taxonomy)
You have a taxonomy, when editing a term in the taxonomy you select posts that should be in that taxonomy?
If this is correct then you’re doing this backwards. In WP the relationship works the other way. You would put a “Taxonomy” field on the “poat” and when editing the post you would select the Term that the post belongs to. This causes WP to create the correct relationship so that it will do what you’re looking for.
