sugarcrave.co review for Variant Option Product Options

I'm using this app with the Shella theme which was performing just fine at first. It seemed to be compatible until last night. I've had 7 sales come thru that were attempting to buy one product and were shown an opposite product in the cart. They were also charged for the opposite product which means I have to issue 7 refunds. This has also slowed down my sales as I get 20/day before this time and today is my busiest day of the week and I'm sitting at 7 sales???? I lost money over this app glitching tf out.