I am also having the same issue with my project. The interesting thing is that the search results are not sorted in the API, but are sorted in the web query. I have been trying to limit this by specifying the OrganizationID and the DomainID for the author
and the wish was to get the correct author as the first hit when limiting the results to just one. However, with multiple cases, I found that a more dominant co-author is returned as the first hit from the API and the correct author is in the list at number
2 or 3. However, the correct author is suggested when a search is done on the web search limited by just the domain.
I can provide some examples if more details are needed. Is the API even doing any sorting of the relevance when a search is done?
Rasika