We recently upgraded our sendy version to 1.1.6.3 and setup our email like normal and sent out the email to our 2 "lists" like normal. These 2 lists each contain about 65,000 different emails for a total send of about 135k emails going out. Weird thing is when I checked the email details later in the evening Sendy said it sent out 222,880 emails and Amazon SES says the same. When I view the campaign stats, it shows emails only went to the 2 different lists so where did the extra 90,000 emails come from? The sad part is our "spam count" and unsubscribe rate also doubled for this campaign since people were getting 2 emails -- thankfully our "numbers" of those are still very low.
What can I look at to dig and see what happened? I have another email to send out and don't want to double up on emails again.
FYI our server is a AWS C1.medium running debian (PHP Version 5.3.3-7+squeeze15). As for Sendy patches we send out subscriber emails about once ever 10-12 days and have religiously upgraded each time prior to sending when their was a new patch/upgrade available.
Thanks! Jeremy