investigate wof hierarchy discrepancy

[missinglink]

We have a report that https://spatial.synergy.io/explore/place/wof/85931121 is not showing the correct hierarchy.

The record shows a localadmin as parent which is not visible in the spatial database:
https://github.com/whosonfirst-data/whosonfirst-data-admin-us/blob/master/data/859/311/21/85931121.geojson

This may be related to a bug in the 'rank' algorithm in https://github.com/pelias/spatial/blob/master/import/source/whosonfirst/map/hierarchies.js