I created a new form (called mytestform) for testing a problem in which emails are sent when selecting the off line process but not the oS-authnetsim processor. The form can be accessed by
www.bestcamp.org/mytestform
Symptoms:
-using the off line payment plugin emails are sent to administrator and to user.
-using the os_authnetsim processor (recall you modified my software to allow for selection of payment plugin) no emails are sent. The form does redirect to authorize.net and accept payments.
I opened up a support ticket as well.
Thanks.