Oh yes you do. As BrianMis said, it may not be labeled a "Lease Fee" but there is no way that you are leasing two receivers and not paying a lease fee. The Lease Fee and Additional Receiver fee are identical and interchangeable. You pay one or the other, not both...but you are definitely paying one of them.
Dish considers the $299 a "lease upgrade fee" it's a fee they charge you to upgrade to new leased equipment. It is a one time fee, if it is the only receiver on your account the monthly fee would be included in your DHA plan. If there is more than one receiver on the account then you would pay $5.00 a month per receiver.