Within the last few months I picked up a Ohana Willow Tenor and a Lanikai LSM-T and noticed on the back that the seam and the heel cap don't match up. One ukulele is approx 1/8" off center and the other is slightly more. Is this just an esthetic problem or could it be more of a serious problem. I haven't noticed this on any of my other mid-low priced production runs. Is this conditioned considered to be a crooked neck? Just wondering, as my eyes are drawn to it every time...