EC Suite - A Payment Gateway

Hello,

Please help, if possible.

Its about EC Suite - a payment gateway. Related manuals and document can be found at http://www.ecsuite.com/cs/.

I wish to implement it. After successful implementation I am facing the following problems. If possible then please help me to sort out the problems by your advices and suggestions.

1. After successful payment and redirection to the site, more than 1 mail send to the customer (between 1 - N times). But in my code only once the mail has send to the customer and other 2nd mail sent to the site Administrator. Why this is happening ?

2. I am not sure that whether the values are returned by the EC Suite are correct. Though I am accepting the variables in $_POST. How can I test it ?

I am looking for your suggestions. Please help. Thank you in advance.

Regards & Thanks.