Dunque,
è possibile usare un solo tag "position" per vista.
Quindi, per fare due operazioni diverse su due nodi, bisogna creare due distinte viste ereditate dalla stessa vista:
<record model="ir.ui.view" id="product_normal_form_view_myview">
<field name="name">product.form.myview</field>
<field name="model">product.product</field>
<field name="inherit_id" ref="product.product_normal_form_view"/>
<field name="arch" type="xml">
<page string="Information" position="before">
<page string="Auto">
<field name="x_Data"/>
</page>
</page>
</field>
</record>
<record model="ir.ui.view" id="product_normal_form_view_remove_packaging">
<field name="name">product.form.remove.packaging</field>
<field name="model">product.product</field>
<field name="inherit_id" ref="product.product_normal_form_view"/>
<field name="arch" type="xml">
<page groups="base.group_extended" string="Packaging" position="replace"/>
</field>
</record>
