Why does Form W-2 box 12 show my HSA contribution as an employer contribution?

Why does Form W-2 box 12 show my HSA contribution as an employer contribution when all contributions were entirely my own?
When asked in TurboTax to enter *my* HSA contributions, the boxes to be filled in are described as "Employer contributions" for tax years 2011 and 2012. 

I just don't want to shoot myself in the foot here by entering *my* contributions as *employer* contributions which they are not.
Would appreciate any clarifcation or words of wisdom!
    W-2 instructions:

    Code W—Employer contributions to a health savings account (HSA).

    Show any employer contributions (including amounts the employee elected to contribute using a section 125 (cafeteria) plan) to an HSA. See Health savings account (HSA) on page 8.              



        Contribute an answer

        People come to TurboTax AnswerXchange for help and answers—we want to let them know that we're here to listen and share our knowledge. We do that with the style and format of our responses. Here are five guidelines:

        1. Keep it conversational. When answering questions, write like you speak. Imagine you're explaining something to a trusted friend, using simple, everyday language. Avoid jargon and technical terms when possible. When no other word will do, explain technical terms in plain English.
        2. Be clear and state the answer right up front. Ask yourself what specific information the person really needs and then provide it. Stick to the topic and avoid unnecessary details. Break information down into a numbered or bulleted list and highlight the most important details in bold.
        3. Be concise. Aim for no more than two short sentences in a paragraph, and try to keep paragraphs to two lines. A wall of text can look intimidating and many won't read it, so break it up. It's okay to link to other resources for more details, but avoid giving answers that contain little more than a link.
        4. Be a good listener. When people post very general questions, take a second to try to understand what they're really looking for. Then, provide a response that guides them to the best possible outcome.
        5. Be encouraging and positive. Look for ways to eliminate uncertainty by anticipating people's concerns. Make it apparent that we really like helping them achieve positive outcomes.