If you add all events with the same event ID it will not work.
According to the article posted above, you have to use a unique ID for each event.
You also need a seperated lua entry for each event/quest or it will load only one entry.
Example:
You can see I created multiple entries to exchange items, similar to events. Each of them is using a custom ID. Ofc. you have to use the "original" IDs of your events, check the article.