Plugin returning product variations that are not available

Hi, I sent a support request about a week ago but no response, we having an issue where the search results returned or displaying product variations that are not available and out of stock and allows them to purchase it which is a major issue. Steps to recreate the issue, search an item thats not available and click enter dont select the item, the item is then displayed amongst all results allowing you to add to cart. Another note is the plugin has an update available but wont let me update. thanks