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Tilemill reversing land and water at high zoom levels

I tried asking this over at MapBox's support forum and got no help.
I am trying to generate a map of Northern france using Tilemill and this set of land polygon data from openstreetmapdata.com (the first download link).
However, at zoom levels 17 the water and land invert colors and styling (see attached output from Tilemill). Any idea of what's going on? Is the data bad? Can someone help me find an alternative? Thanks!!

Zoom level 16

Zoom level 17