Stray days added to duration

Hey, I am having an issue where the relative time between `2022-07-11T09:00:00+02:00` and `2023-07-11T09:00:00+02:00` is `1 year, 5 days` instead of `1 year`. Similarly `2023-05-11T09:00:00+02:00` and `2023-07-11T09:00:00+02:00` are `2 months, 1 day` where I'd expect it to be just `2 months`. As I shorten or lengthen the difference between datetimes the days decrease or increase respectively.

I can think of possibilities at calculation level where these come from, however I find the human-readable duration confusing.