[support] E-Comm Module Problems

At one point I thought I remember seeing mailing list for modules but now I can't seem to find it. If I'm posting to the wrong list please kindly point me in the right direct. I seem to be having two problems with the e-com module (from 4.6 from CVS) one Emails aren't being sent out when and order is taken, yet I'm pretty sure I have that option set. Two Orders aren't being sent to authorize.net, even though I have the transaction Id and securety Codes correct. Any thoughts on what I'm doing wrong will be helpful.