It looks like you have only imported the multipolygons and not the polygons, hence not a lot shows up when you view it.
I would use ogr2ogr with the
Define the geometry type for the created layer. One of NONE, GEOMETRY, POINT, LINESTRING, POLYGON, GEOMETRYCOLLECTION, MULTIPOINT, MULTIPOLYGON or MULTILINESTRING. And CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE and MULTISURFACE for GDAL 2.0 non-linear geometry types. Add "Z", "M", or "ZM" to the name to get coordinates with elevation, measure, or elevation and measure. Starting with GDAL 1.10, PROMOTE_TO_MULTI can be used to automatically promote layers that mix polygon or multipolygons to multipolygons, and layers that mix linestrings or multilinestrings to multilinestrings. Can be useful when converting shapefiles to PostGIS and other target drivers that implement strict checks for geometry types. Starting with GDAL 2.0, CONVERT_TO_LINEAR can be used to to convert non-linear geometries types into linear geometries by approximating them, and CONVERT_TO_CURVE to promote a non-linear type to its generalized curve type (POLYGON to CURVEPOLYGON, MULTIPOLYGON to MULTISURFACE, LINESTRING to COMPOUNDCURVE, MULTILINESTRING to MULTICURVE). Starting with 2.1 the type can be defined as measured ("25D" remains as an alias for single "Z").