Some renderers treat anything with a layer of less than 0 as being underground. If you've got a situation where two above-ground objects intersect (such as a service road running under a gas-station canopy), it's better to raise the canopy than to lower the road.

There are a number of major errors here:

1) You added a group of roads, but failed to connect them to the larger road network.
2) You tagged them as "living street", but two of them are residential roads and the third is a driveway.
3) You added three parks that aren't parks, they're fragments of a golf course.
4) You tagged a number of houses as having four levels, when they have either one or two levels.
5) You tagged several garages and sheds as "residential buildings".
6) The quality of the building outlines are quite low, bearing only a vague resemblance to what's actually present.

Please be more careful in your mapping.

There are almost no "living streets" in the United States. If you see something that looks like it might be one, it's probably a residential street, service road, or footway.

Please don't just scribble out buildings. It takes hours to clean them up.

Is there a reason why you tagged a section of WA-206 as "primary"? The usual convention is that state routes are tagged as "secondary" unless they're particularly significant or particularly minor (and WA-206 is verging on "particularly minor").

It's also not how they're labeled on the signposts -- it's just a bare campsite number.

The Specimen Ridge trail doesn't have a bridge across the Lamar River, either.

If the editor is telling you about a path that's crossing a river, don't just click the "add a bridge" button to make it go away. There very much isn't a bridge across Slough Creek at the spot you added one.

Where are you getting the bridges on the Pelican Valley trail from? Aerial imagery doesn't show them.

Why on Earth did you delete the Grand Prismatic Spring overlook?

That map says it's based on OpenStreetMap.

Liberty Cap isn't a mountain peak, it's a rock formation.

I know for sure that "Canyon Campground road" is wrong, and I'm reasonably sure the rest of the names are as well. (Source: my parents spent a season working at Canyon Campground.) I'll be reverting the batch.

I've reverted this changeset.

I added those because I hiked them and have GPS traces showing the routing.

OSM isn't supposed to be a copy of various official maps, it's supposed to be the result of looking at what's actually there. Just because something isn't on an official map isn't a reason to delete it.

As far as I can tell, the paths you deleted still exist. Why did you delete them?

Where did you get this name from? The BC government has some very different names for this section of highway.

The most common way to map a business inside a building is to add a point with the business information; a more detailed method is the Simple Indoor Tagging scheme: osm.wiki/Simple_Indoor_Tagging

Drawing one building over another just confuses everyone involved.

I don't think an access of "permissive" is correct for something that's in a public park.

When you divide a road like you did at the intersection of Lancaster and US-95, please make sure you update the lane counts and move the traffic signals to the new intersection points.