Hi @halleystar,

I took the liberty to re-format your post a little using https://jsonlint.com/ to make it more readable.
To answer your question: using http://geojson.io, I can see the point you query with lies outside of
document 4, but right on the edge of document 41. So this was probably a bug that was fixed in after 1.7.
"_id" : "4"
![id_4|611x500](upload://gdhciFBe6LXs9E6LJBfN2C4fOB4.png)
"_id" : "41"
![id_41|626x500](upload://15vg6HVfSMgdRnk6tQa5kiktEva.png)

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