As of now, there's 279 updates with 229 owned by various admins and 50 unowned submissions.
This is for the entire database not just Nevada.
Nevada seems to be pretty up to date.
What webpage showed the NV admin was so far behind? I'm kind of curious since I can't find that information anywhere.
I'm sure you're right, when I put in my submission I saw those numbers and guessed they were from Nevada, not the whole DB - regardless, the Washoe county database is full of errors. Most locations are either set at the center of the county or have no info at all. It seems it might easier to buy a regular scanner and just program in what I want instead of figuring out the location and range of all the systems here.
See the database issued this morning. All of the operational channels have been set to cover the airport property. However, air traffic control is still currently inheriting the county's settings (which substantially overlap your recommendations with a slightly smaller radius). The air traffic channels should be set with a range that covers the actual air routes for those frequencies and need to be updated by someone who knows what that coverage is. But, meanwhile, the channels will all be selected in the immediate Reno/Sparks area.