It appears you are all saying the LA noticed the mistake. Sometimes this may not be the case in which case they will quilt not knowing there is a problem, and quilt it without realising any faults.
the quilt when it goes to the La should be checked by maker thoroughly.
The La can check and look over when delivered. If at this stage they should make a quick call
if La doesn't see. Mistake it is not their fault it is quilted over.
Good working relations need exist.