Swim activity - update the distance for an interval

Hello,

I regularly have little problems during swimming sessions, indeed, my Garmin sometimes doesn’t count the lengths correctly.
2 examples from my last activity (picture)

250m instead of 200m and 1050m instead of 1000m.

I’d like to correct this in intervals.icu. but I don’t know the right method. The final objective is to have the good pace and so the good zone and intensity.

If I modify the distance of an interval via the “interval data” panel, the distance is modified, but the elapsed time is recalculated with the new distance, but the time is already correct. And so I have not the good pace/intensity/zone

What’s the correct method to fix interval distance in a swimming session?

Thanks a lot!

I use this tool for changes Swimming Watch Tools - Upload
There you can easily split and merge laps.
Only the no of strokes is not adjusted per lap.

I tried to use the “edit function” for the split (see the attached picture).
But if I change the distance, the time is adapted automatically. It is impossible to change only duration or only distance…

Capture