are the panels prebuilt? If so I would say that is a standard in prefab homes. The lumber companys do not care what the panels look like after they leave the lumber yard. I would just make sure the corners are plumb, if they are then it shouldn't be a problem.
But... Like others have said the top plate should at least span 4 feet past the break in the wall.
Everyone is saying sloppiness by people in a hurry, well if it is a panel built home, most of them only pay 2-4k to frame a house.
Most framing contrators should not have to fix panel wall, as they are not the ones that built them.
Union Journyman carpenter talking here, so I do know what I am talking about
edit, I just read that they are panel walls. Where I come from in Indiana, the panels do not come with the top plate installed.