Yes, that's in my mapping, as is
boundary="national_park". I've managed to get one missing polygon (#7270564) to be imported by adding
Name: ["Multipolygon's Name Here"] to my mapping, but I've found two more that won't import even if I use that workaround:
2131838, boundary="national_park", name="Great Smoky Mountains National Park"
166587, boundary="national_park", name="Blue Ridge Parkway"
Both are in the cache. Weird!