We are aware of players attempting to purchase Primal Gear and Seals of the Brave not accepting the current 50% off Seal Vendor discount. We are working on a fix for this issue but unfortunately will not be able to release the fix prior to the sale ending. We hope to have another Seal discount sale in the near future after the issue is resolved. We apologize for the inconvenience this may have caused.
UPDATE NOTE: If you purchased any items with Seals of the Brave prior to the notification that the discount was not being applied correctly, please submit a ticket to Support so they may reimburse half the seals on items purchased.