In the screen shot below, notice I am not permitted to move the milemarkers up. The dragging method doesn't work, either.
When I engage the Industrial Zones, I can't move them down. And, as you might guess, I want the Industrial Zone polygons UNDER the roads and milemarkers.
I have also tried removing the layers and re-adding them in different order, to no avail. ArcGIS Online demands I place those polygons above my lines and points.
Any suggestions? Any known bugs related?