I have a Google Custom Search Engine (CSE) with one site. Adding a second site gives me fewer hits. Removing the second site gives me back the hits I had with only one site.What is going on there?I add the sites with XML to be sure of what I am doing, like below:<Annotations>  <Annotation about=site1url score=1>    <Label name=_cse_MYID />  </Annotation>  <Annotation about=site2url score=1>    <Label name=_cse_MYID />  </Annotation></Annotations>UPDATE: Here are instructions for anyone who wants to test:Add these two sites to a new custom search engine (https://www.google.com/cse/):  www.zotero.org/groups/from_some_psychologists/items/itemKey/*  www.zotero.org/groups/minding_my_mitochondria_terry_wahls/items/itemKey/*Search for food (you will get 2 hits)Now delete the first site from the custom search engine.Search for food again (you will now get 19 hits)UPDATE 2:I posted the question also to Google Product Forums > Google Custom Search:https://productforums.google.com/forum/#!category-topic/customsearch/indexing-and-results/8Qs60jdiFZQUPDATE 3:I previously thought that the hits when having both sites were always only from the second site. That was wrong (so I removed the part saying so).
Adding a new site to a Google Custom Search Engine gives fewer hits
google custom search