Thank you.
There is no delete entry in order to maintain the consistency of data. It is probably something that I should add!! In lieu of that, you can find the entry in the mh2tr_transactions database and just delete the record there via phpmyadmin.
The system does not actually send the emails, it comes from Paypal direct. Easiest way to have the notification sent to multiple people is to create a forward in your cPanel. The forward will copy the messages to each person listed.
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you are wayyyyy awesome! Heading to Joomla now to give you a big thumbs up!!!!