I wouldn't worry about it one iota. As long as they can identify your eticket number and pull up your itinerary -- and they should with an eticket number and record locator -- a name order sequence mix-up by itself in Laos most definitely won't cause a problem. It is not unusual for Laotians to have their name order different than how it usually goes in most countries in Europe and the Americas for most people in said geographic areas.

Enjoy your trip.