Probably has to do with the fact that it is a very unusual spelling of that particular name.
You are a tool for pointing out typos on the Internet.
Sorry Sasheem, but I'm going to agree with the tool. Spelling a players name wrong is not a typo, it's spelling a players name wrong. A player that has been with the program for over 4 years now. There are also rosters with the correct spelling of the players on probably every fan affiliated site.
Also, Bernstine is not very unusual. Actually, an easy way to think about it is that the stein name ending originated primarily from Jewish, Eastern European heritage. So, unless you think Jordan has a Polish, Caucasian, Jew somewhere in his family tree, the spelling of Bernstine might actually make a lot more sense.