Well.. I'm afraid you are not actually supposed to use Sports Tracker as a web service for your Suunto App data. Or at least not to expect that it actually works. That current state is more like an unplanned side effect, a messy one./../or the Sports-Tracker Webservice. /../
Just try to find a single source where Suunto actually encourages the use of Sports Tracker web along Suunto app.
Considering https://www.suunto.com/News/suunto-and-strava-deepen-partnership/ & https://www.suunto.com/partners/strava/ , I don't believe Sports Tracker web service will see much love from Suunto in near future.