Hi @perreb - We implemented a fix for this in yesterday’s patch (see the lasted comment in the Major UI/UX Update - Orchestrate Your Training thread).
For now, you have a couple of options: you can either remove one of the activities or use the ‘Summarize Daily Activity’ button in the planner on days with duplicate activities to hide one of the duplicates yourself.
Alternatively, you could delete and re-sync your recent Zwift rides from Strava. Any duplicate files should be automatically recognized as duplicates and won’t affect your Training Load, etc.
Regarding Elevation - odd. I suspect that Strava performed some sort of elevation correction before sending us the data. I assume that the raw elevation data from Zwift should generally be free of errors, as it’s not being calculated in real time from a barometric altimeter like most bike computers..