Except there is a point on the other side of that seam (if we're talking about the FG border).
So if you adjust it (without taking it apart first), there goes your point.
Piano key borders are very easy to adjust.
There are certainly quilts and situations where a quick fix is perfectly fine. I do it all the time, as my middle name is "lazy."
But there is so much work, time and $$$ already put into this quilt that it really warrants fixing it correctly.
But let's wait for the OP to come back. Maybe she'll have a picture. ;-)