Issue with release dates

Re:Zero kara hajimeru kyûken jikan (bureiku taimu) is a Re:Zero spin-off web series with episodes released on YouTube.

Previously, the episodes (from the first season) were listed on the main series page without numbering. I created a dedicated page for the web series and merged the episodes. The problem is that the incorrect episode dates from the main page listing persisted.

I managed to find posts on the official X account announcing most of the 11 episodes of the first season.
Episode 1
Episode 2
Episode 3

Episode 5
Episode 6
Episode 7
Episode 8
Episode 9
Episode 10
Episode 11

I couldn't find a post announcing Episode 4, and although I don't have an official source for the date, I noticed that the current date listed for Episode 4 matches the official date for Episode 3, whereas the IMDb date for Episode 3 matches the date for Episode 2.

What should we do about the incorrect date for Episode 4? Leave it as is? Remove it? Change it to match Episode 5's date, since all the episodes seem to have the date of the following one?