Might be a couple of spokes that were replaced by the guy that sold them on ebay. Like BD says, maybe he laced them differently.

Check the pattern compared to the other spokes. Over over, under?

Gina has similar OP type wheels on one of her bikes. From the hub is over over ,under. The last cross touches, the other two closest to the hub don't.

If it's a problem, it will more than likely start coming untrue everyother time you ride it. I've never had a wheel explode under my weight so shouldn't be dangerous for you to ride it. IF it continues to go crooked, maybe have it relaced with new spokes, about $60....$20 for spokes, $40 for labor.