WooCustomer sorting is not working

Hey guys, I installed this plugin – Woocustomer, to get a list of our customers, a total value they spent, the number of purchases, last order date, etc. I was trying to click the menu bar to sort, like from the highest total value spent to the least. But the sorting function on the menu bar is not working. Do you know why?

Also, can I export the information to an Excel sheet? That will be easier if I do it in Excel. Do I need another plugin for this feature?

Thanks!