How to export and analyze Apple Watch health data?

I exported my Apple health data, and when reviewing the file for a particular day/hour, I noticed there were step entries for time periods that were not reported in the Apple health app. For example, Apple Health app reported zero steps from 1:00-1:15, where the Apple health data reported steps. Am I misinterpreting the data? Some of the step entries reported in the Apple health export that were not reported in the Apple health app seemed quite unrealistic, such as 900 steps in 10 minutes while indoors at a bar.

[Re-Titled by Moderator]