@keenum, the reason for having download issues is due to the issue as shown in the image below:
If you look at your choices sheet, I can see that you have used space, - which is not permitted under the name column.
So the current workaround for your issue would be that you use the XLS (legacy) to download your data.
Apart from this, I also see that you have two questions with many choices. One question with the list_name alloted_dt has 12050 choices, while the other question with the list_name staff_id have 826 choices. Such a large choice will take up all the memory and time to execute the request.
Hence it is always advised to use external choices if you should have such large choices in your survey.
