In the Power Store admin section in the settings, there is a section for store emails, you can set the receipt CC or BCC option to send a copy of the receipt to the store owner.
for the paypal button issue, I have created a support ticket so we can look into this issue further.
To view and edit your support ticket, please log into your support history:
supporthistory.php
If anyone else is experiencing this same issue, please append to this thread.