Why is the Sales Order showing as not paid in Xero but Paid in Cin7?

I have entered payment information into the Sales Order in Cin7  but when I look at the invoice in Xero it shows unpaid. Why?


Payment information entered into the Payment area at the bottom will not be pushed through to Xero. Payments received from your payment provider in Xero will need to be applied to the invoices in Xero after they have been sent from Cin7. 

10/3/2017 - Mara