Coupon not working as it should in vantage
We are using vantage 1.3.1 and we have installed the latest version of Appthemes Coupons plugin.
We have added some coupons, some in uppercase, others in lowercase and some mixed, that can be used by each user only one time.
We were testing if the discounts were working as they should and found a big issue.
For example if we create a coupon named "COUPON1", everything works well if the user writes in caps, but if the user writes "coupon1" the publishing continues even if the user has already used that coupon code.
Same thing happens with the coupon code in lowercase or mixed, it only works well if the user writes in the same letter case as the coupon was defined, if the user writes the same code but in different case he can bypass the system.
Does anyone had the same issue and have any idea how to solve this?
P.S: If the user writes one coupon code that doesn't exist the system performs as it should, saying that that coupon doesn't exists.