Hey there, @VeerBansal18. Thanks for taking the time to reach out to the Shopify Community with your discount usage question. It's good to meet you!
To set some expectations, we're unable to authenticate users here in the Shopify Community. This means that we're unable to access our admin, or access any of your store data, so we won't be able to look through your admin here and cross-reference the information to find out what the cause of the miscount may be.
Instead, you'll want to reach out to our Authenticated Support Team using this link to have them access your account and investigate the potential cause. You can use the link to login to your account, select the prompts that match your issue, and then you can pick from the available contact options.
Let me know if you have any additional questions!
Imogen | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog