Querying Oracle Text using phrase with equivalence operator and NEAR

Hello,
I have two queries I'm running that are returning puzzling results. One query is a subset of the other. The queries use a NEAR operator and an equivalence operator.
Query 1:
NEAR((sister,father,mother=yo mama=mi madre),20) This is returning 3 results
I believe Query 1 should return all records containing the words sister AND father AND (mother OR yo mama OR mi madre) that are within 20 words of each other.
Query 2 (a subset of Query 1):
NEAR((sister,father,mother=yo mama),20) This is returning 5 results
I believe Query 2 should return all records containing the words sister AND father AND (mother OR yo mama) that are within 20 words of each other.
Why would Query 1 be returning fewer results than Query 2, when Query 2 is a subset of Query 1? Shouldn't Query 1 return at least the same amount or more results than Query 2?
~Mimi

For future questions about Oracle Text, you can try the Oracle Text forum at: Text
There you have more chances of recieveing an awnser.

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