Module excludes duplicate nodes contained in view embedded in header of main view, although such nodes display first.

Module excludes duplicate nodes contained in view embedded in header of main view, although such nodes display first.

In particular:
- my "taxonomy_term" view has a second view embedded in its header
- the output of the embedded view is displayed first, as it is embedded in the header of the "taxonomy_term" view
- both views contain duplicate nodes, needing to be excluded from the view which displays second, in this case the "taxonomy_term" view, which is the "main" view, although its contents display second
- however, duplicate nodes are excluded from the embedded view (which displays first, being in the header) instead of from the "taxonomy_term" view, which displays second.
- it is necessary to keep the first instance of the nodes, i.e. those displaying at the top, generated by the view embedded in the header of the "taxonomy_term" view

Why does this problem exist, and what may be done about this?

Thanks!