Had a similar experience.
wanted the whole bolt,clerk said"this just came in this morning nothing cut off this bolt so it is the full 20 yds"
"So I won't bother taking it all off the bolt and rewrapping."
no problem paid for the 20yds and left
well get home and start unrolling and cutting only to find that there are only 12 yds on the bolt!
Owners response" how do we know you didn't cut some off?"
lost my business!
some of the LQS should close!
I don't know of any fabrics that are put up in 20 yard bolts for stores. We get 10's and 15's (which is the most prevelant), and some companies, like Quilting Treasures, put up 12's.
But I've never heard of 20 yard bolts, except for some battings, like Insulbrite..