Hi Jamie,
How strange! I haven’t heard of this exact situation before, and nothing about the specific text you’re trying to change gives me a good clue as to why it’s evading your edits…
One thing that can come up is that if you’re editing a Linked Copy of an event (i.e., a sharing suggestion that’s been accepted to another group), it can sometimes confuse things when you’re only editing your group’s copy of the event, not the underlying source event. In your case, I’d double-check that the URL is livewhale/?events_edit&id=273343 when editing to make sure you’re editing the right event.
If that still doesn’t work, you or another admin can check the error log for errors (/livewhale/?lw_debug=2) which might be illustrative.
If neither of those works, feel free to submit a Help Request and we can log in to help debug in a more hands-on way.
Karl