Such a thing will often happen as the result of a celebrity having the name. For instance, famed Fleetwood Mac singer Stevie Nicks, whose real name was Stephanie.
Interestingly enough, Lindsey, like Lindsey Buckingham, the guitarist of Fleetwood Mac, became a more popular girl's name during Fleetwood Mac's heyday.
Anecdata, but as a USian, it's always been an E/A spelling variation, E male variant, A female variant... YMMV
I'm just going by the article, which has data for both names. If you think it is wrong, take it up with them :)
Years ago, one of the broadcasters for a Red Sox game was doing some ad read about some event Stevie Nicks was going to be at, but they read her name as "Steve Nicks" instead. Someone else in the booth corrected them, and they responded "I know him well, and I call him Steve". A fan apparently sent them a giant poster of Stevie Nicks, and the others put it up in the booth and teased him about it relentlessly during the next game.
The past tense "was" had me at least looking for an obituary. She is still very much alive
I was referring to the Stephanie part in the past tense. I doubt she's gone by that name since she was a child.