Showdown Rugs review for PreOrder Now Backorder WOD

I actually logged into this app to delete it. I love the idea, but since adding it to my shop it has reduced my sales by playing havoc with the online store. Customers cannot use the drop downs in my store as when they go to the checkout their selections have changed to the top selection on any product. Not what they have chosen. I cannot recreate it and your support people cannot create the issue, but I have so many complaints. This was never an issue prior to the integration of this app.