It should not have done that.
So say component A has proxied OOTB component, and then you update the component's policies to use a particular style system. If your component A is included via granite ui utils from Component B, then your component A should retain the component policies.
Now say you component B is going to @include Component A, but now you want to remove some touch ui fields from the component. Unfortuntely, from experience, you must proxy your component A as component C, and then manually manage nodes from the cq_dialog.