This past weekend, my sister wanted to update her book cover. I helped her out and even uploaded the things to her pages for her--Smashwords, Barnes & Noble, and Amazon.
When she went to see the updates, she clicked on the sample for Barnes & Noble. But it wasn't only a sample--it was the ENTIRE BOOK! Free for anyone wanting to sample it! She contacted B&N and they said it was their fault, to call back on Monday and have it fixed.
She's had that book for sale for a few years now, and neither of us thought to look through the sample. Because this is a computer age and anything can happen, please look through your sample and see if it's the right length. It should be around 20% of the book or less, depending on the site. So if' you have a 100 page book, that's like 20 pages.
Pass this on to your friends, too. I'd give you the name of the book, but she can't afford to lose more sales.