I tried calling the API manually, first for "instances" metrics, using this report description:
{u'reportDescription': {u'dateFrom': u'2018-11-05',
u'dateGranularity': u'day',
u'dateTo': u'2018-11-12',
u'elements': [
{u'id': u'mobiledevicetype', u'top': 200}
],
u'metrics': [
{u'id': u'instances'}
],
u'reportSuiteID': <<MyReportSuitID>>
u'segments': [
{u'id': <<MyID>>}
]}}
The I got a report ID and used it to get values.
After that, I changed the metrics in the report description above from "instances" to "visits", and requested for data, got another report id, and requested for values again.
I got the same values.
Is this a bug from Adobe's API?