Hey Sarah,
Thank you for reaching out to us! I’m very sorry about this issue you are experiencing, let me help you to solve it!
A few weeks ago I worked with a similar case: the Event dates were replaced with the Post dates and in that case the cause of the issue was a theme conflict.
Can you please share your system info with us?
Also, I would suggest you to run our Conflicts Test. You can start the test by temporarily deactivating all of your plugins (except Modern Tribe plugins) and changing your theme to another one like Twenty Seventeen and let us know if the issue persists after that.
Thanks!
Patricia