Changing start time while editing exercise doesn't update duration

[t.parker]

I tried to trim my run by half an hour and expected that duration would automatically adjust (like it does on Garmin or Strava). It doesn't.

screens above show editing my race and changing the start time from 9:00 to 9:32. What I expect is reducing the duration. Instead, I see an error message.

[t.parker]

It seems like the feature is even more buggy. I edited the run and updated the duration manually but there are more issues.

• There is no way to specify seconds for the duration or start time. It's run, every second counts, otherwise the average metrics will be incorrect:
  
• Editing the activity works (start time and duration have been updated) but also creates new activity:
  It is nice that the Android app finally allows editing activities but is the QA department off sick or something? This feature is riddled with bugs and feels unfinished.