This is the total range as it was measured by the calibration procedure.
Yes, because the calibration did not change and it is still 938 degrees for a full lock.
I guess this is because you did not wait long enough. It can take up to 24h until an config change on the Smart Lock done by the mobile App, makes it into Nuki Web. You can force a sync in Nuki Web by clicking on the appropriate link on the Smart Lock view or change the settings right within Nuki Webs Smart Lock Administration page.