Hi @Michael_Wilcher, welcome to the Asana Forum! In order to investigate this further, I recommend you to contact our support team and send them the CSV file you are trying to upload or just an example so we can try to reproduce it on our end.
When you contact them, please also send the URL of this thread so you don’t need to repeat the information.
I hope the issue is solved soon! Let me know if you have any other questions!