gtv, I believe that is because the press release on Yahoo is from Wilshire not Hemi (see Source: in the upper right). The others on Yahoo for Hemi have the source as Hemi. Might have something to do with how Yahoo attaches press releases to tickers based on the source?
It has been on yahoo since yesterday evening. If the name hemi is on it, thats good enough for me. Wilshire is a vast company. To be on so many newsletters and aites, they have to have a wide connection.