It is very likely one invoice is for your web site hosting fees, and the other is for your domain registration fees. Each invoice and/or sales receipt always has very detailed line items stating what each charge is for. You will see line items like: YOURDOMAIN – Hosting Monthly  -or-  YOURDOMAIN – Hosting Annual  -or-  YOURDOMAIN – Domain Registration.

Please feel free to call or email or our support or billing departments if you have any questions though – we are always glad to help out!