Dear Jenni Copple,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
As per your description, please let us cooperate and please don’t worry, we can work together to narrow down and resolve the situation.
Try to select menu item File -> Options -> Advanced
Under "Editing options" header uncheck the box against "Extend data range formats and formulas". Refer to screen shot below.
It doesn't work then as I cannot access your sample file link, you may upload into your OneDrive account and share a link here and we will be tested on that and verify the result with you in a productive manner.
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Sincerely,
Waqas Muhammad