A asd315 – I am having the same issue. I was able to add a duplicate event to show in my dashboard but now I a duplicate showing on my page with now way to delete the old on as it is not in the dashboard list.
I did this (duplicating) for another missing event and the original suddenly reappeared and I was able to delete one of them. So I tried it (twice) for another missing one and it didn’t work now I have three of he same event showing on my site but only one in my dashboard. I’m guessing it is a database issue but I’m no sql wizard…
…if anyone can help that would be great.