I have a 3/4 carved top, flat back DB built in 2000. It sat in the the store until a month ago when I became the proud first owner. No seam problems were evident. The luthier did some set-up that included shortening the sound post. After about two weeks in new environment ( my place) the seam between the lower bout, treble side and the back opened up, about the width (edge side) of a business card. I had it re-glued at the shop and when the clamps were removed it popped again. They applied a stronger mix of hide glue and it appeared to be fixed. Back home again and in a couple of weeks it opens again. I use dampits and monitor them daily. There is no buzz when played, and no flap when I thump the back. Questions: -The weather has cooled, should sound post tightness be re-examined, I assume yes. -Is this unusual to reoccur at the same spot? -What is the structural possibility that the bout was cut incorrectly and extreme tension results from trying to close the seam? How is this remedied? I don't wanta know, but go ahead, tell me. ( strange, though, this didn"t happen earlier, when in the store). -What if i just leave it like it is?