Question about Bangle.getStepCount()

Hello,

The doc of Bangle.getStepCount() says

Returns The number of steps recorded by the step counter

but I noticed that all the apps get the step count using Bangle.getHealthStatus("day").steps.

I just send this code to my Bangle2 as a test:

Bangle.on('step', function(up) {
  console.log("getStepCount: " + Bangle.getStepCount());
  console.log("getHealthStatus.steps: "+ Bangle.getHealthStatus("day").steps);
});

The output is not what I expected:

getStepCount: 6442
getHealthStatus.steps: 3494
getStepCount: 6443
getHealthStatus.steps: 3495
getStepCount: 6444
getHealthStatus.steps: 3496
getStepCount: 6445
getHealthStatus.steps: 3497
getStepCount: 6446
getHealthStatus.steps: 3498
getStepCount: 6447
getHealthStatus.steps: 3499
getStepCount: 6448
getHealthStatus.steps: 3500
getStepCount: 6449
getHealthStatus.steps: 3501

Why is there this difference?

Thank you :-)