Hello!
There are several issues here. I will answer and our team will followup until you have the information you need. The link you posted isn’t visible at the time I checked.
1# The shortcode you shared should show all events with categoryID 387. Share the page URL and WP credentials so we can follow up and take a look.
2# We can take a look at this too. The shortcode shows text from the extract, so, you will also need to change your event listing extract length.
3# That might be adjusted with CSS. Need the URL to check further.
4# You might want to use a different category for the recurring events, if you still want to show them m on each day, and then categorize the ‘festival’ with the categoryID 387 with dates that span multiple days, so there is just one listing for the festival.