@DataOfficer -- I'm sorry you are having an issue setting embed options. I just did some testing and I'm unable to reproduce the problem. Is this an issue on all embeds or just this one? What about embeds in other stories?
If it's only this one, you should be able to get around this by deleting the current embed and adding a new one with the same link.
If the problem persists, please contact Esri Tech Support and they will be able to help you troubleshoot further.
Owen Evans
Lead Product Engineer | StoryMaps