According to Find A Grave, and your link, he and his wife are buried in Columbia Gardens Cemetery, near Arlington National.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=54200704
yes...you are right. That is a glaring mistake.
1. Misinformation about where Byrd is buried
2. Why would Mitch McConnell be consulted? He is not from WV, and a decision to remove Byrd's statue would have absolutely NOTHING to do with him - there is no reason he would be consulted, and
3. Malcolm X? Really? I sincerely doubt that.
I seriously think this "email" is a hoax.