Despite the relentless hectoring of Great Kim aka Mik Taerg and others reading from the anti-birther script claiming a misspelling, I saw no convincing evidence of misspelling when I looked into it. I believe even Kim had to admit to InspectorSmith on his YouTube site that his claims of a misspelling were wrong when Smith backed Kim into a corner. I'm not going back over it, absent new evidence.
Then perhaps we're not talking about the same BC; there is plenty of evidence the doctor spells his name Heltan and not Helton as it appears on Smith's certificate.