Buy Together Add-On Adding Extra Products!

OK so I have set up a "buy together" deal on one of my products. Buy 7 books by this particular author and get $14.00 off your order.

However, it's not acting right. It's adding 2 copies of a couple of the titles instead of just one.

The weird thing is that the PayPal receipt shows the correct amount charged. So does the email sent to my order department email when the order is first created. But the email that gets sent after the payment is processed (one to me and one to the customer), it shows these extra 2 books added, and charged accordingly.

I'm attaching screenshots of how the buy together deal is set up in admin, the first email (before payment processed) and the second email.

What's going on and how do I fix it?

Thanks in advance.

[attachment=11528:Screen Shot 2016-08-17 at 6.20.35 PM.png]

[attachment=11529:Screen Shot 2016-08-17 at 6.29.59 PM.png]

[attachment=11530:Screen Shot 2016-08-17 at 6.20.56 PM.png]

Screen Shot 2016-08-17 at 6.20.35 PM.png

Screen Shot 2016-08-17 at 6.29.59 PM.png

Screen Shot 2016-08-17 at 6.20.56 PM.png

I guess either no one is using this add-on, or this problem is unique to me. :-)

I'll submit at ticket and see what Help Desk says.

Help Desk says it's not a bug and they can't reproduce it on their demo site.

So I guess I will just have to keep manually correcting the orders as they come in.