Yes, it looks like a failure in the explorer.
I was able to reproduce the problem using my Parse.com application and followed the steps exactly. In Parse Explorer, I get a much smaller than expected amount. For now, I would trust Google Analytics numbers.
FWIW, at one particular event, my accounts were 41579 in Analytics and 31848 in Explorer, the ratio was 1.3055. I see that your ratio was around 2.11, which means that the problem is more like a more complicated one than the simple difference in how events are logged. This indicates a deeper problem with how parses numbers add up.
NOTE. I will ask the Parse team if they have any suggestions and reports.
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