Getting new customers to pay in advance for first order then in...

Getting new customers to pay in advance for first order then in future when they prove they can pay (for first order) you give them credit is normal business practice expecially when you use distributors. You can't expect other people to finance your business!
All will become clear in the year end accounts when we can see the cashflow statement & balance sheet (trade receivables etc).
Or you could email the company with your concerns & ask them what the trade receivable balance was at the end of the quarter?