[A lady purchasing before me wanted 10 yards of a muslin fabric and when it was cut she found well over a yard of it was flawed and stained. The cutter apologized and did not offer to recut the fabric for her but said she'd give her another cut for the amount she wasn't able to use. This was for a wholecloth quilt. The poor customer accepted it but was so unhappy and really so flabergasted she just left with the purchase trying to hide her tears. There was no way she could cut the flaws and stains out and sew on the other fabric to make the wholecloth quilt look acceptable. I felt awful for her.
I really wish you would have given the customer a little nudge and told her not to accept it. Some people just become over-whelmed and don't know what to do. I could just see my Mom in a situation like that, she would never have "dared" to say anything.... oh she would have cried, but she would never have said anything!