Yes, when it recorded, your MV was 777, 1.4 degrees of knock retard, and it was at 57mph, since you've had 2 VERY different readings, 17.1 and 1.4 knock retard, take a look at things that could be hitting causing "false knock"
The 17.1 reading was displayed under the data point "Spark Adv" It came out after the first test run and I have not seen that data point displayed since. I also had an "injector Pwr" display once and never shown again.