Separate Top Level H-Card

I’ve found URLs where the top level has two items…one of which is an h-card, the other an h-entry. There are two questions that come from this for the specification.

First, if there is no author property on the h-entry(it could be a different h- element), can I assume that a top-level h-card also reflects the page author?

Second, if there is an author property that is a URL, is there a point in checking to see if there is a more complete top-level h-card with the same URL on the page? It seems this is also a practice that people do.