The latitude/longitude warning comes up when:
a) the address did not change, so the lat/long are unchanged
b) the address is coming up with a “cannot find location” response from Google
SLP will zoom in to show all locations within the given radius. Click on the location in the results will highlight it on the map and show the info bubble. It will not zoom in to that single location. Good idea for a new feature in the Enhanced Map plugin. I’ll put it on the wish list.