There are a lot of strong feelings here, and I can see why. I do think any time one of us delivered a quilt to be quilted we would "think" it was ready. But then we all know how easy it is to not see that mistake that becomes glaring in another's view. I find viewing photos of my quilts throughout the process helpful in keeping things as they should be.
I can understand not seeing a mistake and quilting over it, however, I have to agree with those who have said if a quilter saw my mistake and didn't notify me so I could fix it if I chose to, I would be very upset. These 2 blocks are glaringly wrong and were the first thing I saw as they throw the symmetry of the top all off. I would have a hard time imagining that it was done intentionally and would have had to ask first.
No denying the beauty of the quilting however.