Hey Geoff,
That seems to have worked! It still takes some time to load, I assume because it is updating close to 60 events, but at the end of that I end up on the correct editing page. Thanks for your help.
Is it possible that the site is timing out while updating the other occurring events due to memory shortage? This redirect doesn’t occur when updating non recurring events.
I’m having a similar issue when editing recurring events. After I hit update the page does the loading thing for a while and then eventually times out and sends me to http://mysite.com/wp-admin/post.php which with my setup is a 404 page. The updates seem to save, but this clearly isn’t functioning properly.