Hello Ty,
Thanks for considering our plugins and for reaching out!
I can confirm, if you are updating the event detail in the WordPress admin and you have the option “Leave this event associated with eventbrite.com?” enabled, then the changes will be pushed to Eventbrite as well.
The update doesn’t work the other way around, so if you make changes in Eventbrite, then the changes will not be reflected on your WordPress site.
I hope this clarifies. Let me know if you have further questions, I’d be happy to answer them for you.
Cheers,
Andras