Hi – I’ve just downloaded NetSpot for Mac (macOS High Sierra 10.13.1) and created a survey. The download speeds on all the TP link range extenders AP’s are zero but when I test with Speedtest each AP is running at at c25mbs. The map shows all the AP’s to be zero with the exception of the router where the speed showing is c5mbs when I test this area with speed test wifi is running at c50mbs.