This misconception appears to be shared by both Google and Bing. Google says (bold mine); "We’ve created a U.S. Presidents Showcase to map the birthplaces of all 44 presidents". Bing says they (bold mine); "created a Visual Search Gallery highlighting the past 44 US leaders". Both either plainly say, or strongly insinuate, that the United States has had 44 Presidents. Some may say that it is only a minor error, but to get wrong the number of Presidents on a day and with a posts meant to celebrating the Presidents is pretty glaring.
http://googleblog.blogspot.com/2011/02/explore-our-us-presidents-on-map.html (and, and)
"We’ve created a U.S. Presidents Showcase to map the birthplaces of all 44 presidents, and provide details about their presidential terms, using the Google Earth plug-in. You can also see the states that voted during each president’s election by clicking on the tours in the left column of the showcase.
Whether you’re a history buff or simply curious to learn more about U.S. presidents, we hope you enjoy exploring a little further using Google Earth. In addition to the U.S. Presidents map, educators can use some of our other resources in their classroom to explore more aspects of history. Here are a few ideas:"
"In celebration of President’s Day, Bing has created a Visual
Search Gallery highlighting the past 44 US leaders.
Who was the youngest president in office? Which presidents are depicted on US
currency? What were their professions prior to holding office?
Discover all of this and more in a matter of clicks. Use the left rail to
refine your search or simply click one of the tabs to sort by category.
Happy President’s Day!"