Why does Zillow say my house is a 3 bdrm 1 bath when it's a 4 bdrm 2 bath with a family room?

I see it also is saying the rent, and it's not rented out, I'm living here, has gone down $133.00 in the last 30 days. Where do they come up with this kind of stuff? My house originally was a 3 bdrm 1 bath, and the previous owners got permits & added on.
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