Views filter criteria groups OR not working?
This answer on a related (perhaps duplicate?) issue provided settings that got the display working for me. 

First, on each filter criteria, check "Reduce Duplicates". 

EDIT Actually, the answer I linked says to uncheck the "DISTINCT" in the Advanced settings for the query. However, when I did that, I got duplicates. I unchecked it, and I got the right number of results. So that second step may not be necessary for you.