Thank you for reaching out to TubeBuddy. We are in the process of testing and introducing some new, promotional pricing options for various users. The price that you signed up for is part of this promotional test. This will take the place of the 50% discount (and is actually less expensive than the full-priced license with the 50% discount).
We apologize for the confusion with this; our marketing team will be removing that discount option for these promotional licenses shortly.