I am new to the site but I have been trying to purchase a TF-100 test kit from TFTestkits website associated with this site and I once I enter my financial information in the checkout process it kicks me to an error page and thus the checkout process never completes. I am worried that the three times I tried may come up as processing three times later on. Any idea what is up with them and their faulty checkout process? They aren't responding to their emails or phone calls....