There were some other issues too. Parts of Polaris were marked as generic road, rather than residential, so I was trying to fix those too by joining them together.

Ah, yes, I did that, trying to fix the original problem (part of Polaris and Orion not showing). The ID editor didn't complain.
Thanks for catching it.

Hi Ian, yeah, it was the closest I could get. landuse=government would be better if it existed.