funnel and appacquisitions API endpoints return data that doesn't match Partner Center Acquisitions report (PageViews/Installs/Conversion Rate)

I'm trying to build an automated reporting tool using the Microsoft Store Analytics API, but I'm finding significant discrepancies between the API responses and the Partner Center web UI, to the point where the API data isn't usable for analysis.

Issue 1: funnel endpoint returns drastically lower numbers than the UI

Request:

GET https://manage.devcenter.microsoft.com/v1.0/my/analytics/funnel?applicationId=9N2VLPN4WDK1&startDate=2026-05-28&endDate=2026-05-28

Response:

{"Value":[{"MetricType":"PageView","UserCount":4},{"MetricType":"Acqusition","UserCount":3},{"MetricType":"Usage","UserCount":0},{"MetricType":"Install","UserCount":2}],"TotalCount":4}

For the same date, the Partner Center Acquisitions report shows PageViews: 48, Installs: 5. This is roughly a 10x difference. I've re-queried multiple times and the API result stays consistent at 4, so it doesn't appear to be a data freshness/delay issue.

Issue 2: funnel endpoint does not support daily breakdown despite documentation

When querying a wider range:

GET https://manage.devcenter.microsoft.com/v1.0/my/analytics/funnel?applicationId=9N2VLPN4WDK1&startDate=2026-03-20&endDate=2026-06-30

I expected ~102 daily records but only got 4 records total (one aggregate per MetricType for the entire range). Adding aggregationLevel=day (a parameter documented for the appacquisitions endpoint) has no effect on the funnel endpoint's output, which seems consistent with the documented request parameters for funnel (only applicationId, startDate, endDate, filter) — but this isn't called out as a limitation anywhere I could find, and the endpoint is marked "legacy" without further explanation.

Issue 3: appacquisitions endpoint doesn't map to any UI metric

The Acquisitions report in Partner Center shows four top-level metrics: PageViews, Installs, Conversion Rate, and Install Success Rate. The appacquisitions endpoint returns acquisitionQuantity instead, which doesn't correspond to any of these four numbers as far as I can tell.

Questions:

1. Is there a currently-supported endpoint that returns daily PageViews and Installs matching what's shown in the Partner Center Acquisitions report?
2. Is acquisitionQuantity from appacquisitions meant to represent something different from "Installs," and if so, what exactly does it measure?
3. Is the funnel endpoint considered deprecated/unreliable going forward? Should developers avoid it for new integrations?

Any clarification from the engineering team would be appreciated — this is currently blocking a reporting tool that several other developers might also find useful.