Christians who make a living "being Christian", benefit from having a sordid past and a dramatic transformation. The more sordid the past, the more dramatic the transformation, the better.
This directly translates into marketability as a Christian. And when dollars are on the line, who can blame someone who "embellishes" their past. Like a fisherman talking about "The One That Got Away", the story grows to impress the audience.
When a Christian speaks of their sordid past, how much of their story based on fact? I don't doubt that there is some truth - but how much? In many cases it's impossible to know for sure.