The year that I won all the cash, I took all my sweepstakes stuff to my tax lady. I thought that if I had won over 600.00 dollars I had to pay takes on everything but she didn't even bother with anything but the 5 grand. Handed the rest of the papers back to me and said she didn't need them. That is where I got that info at.
Then she apparently doesn't know how to handle the reporting of sweepstakes prizes. Keep in mind, that most CPA's (hopefully, that's what you used) have no experience handling the reporting of sweepstakes prizes.
Just like our CPA, we gave her all the documentation on the prizes we won and asked her to check the information out with the IRS also which she did and verified.
It sounds to me that your CPA may have been going by the guidelines of reporting lottery, casino, etc., winnings which have totally different reporting guidelines than sweepstakes winnings.
Also, keep in mind, that even if you didn't get a 1099 on any prize, even possibly a smaller one, it doesn't mean that the sponsor didn't report it to the IRS.
Some sponsors will make out a 1099 after an individual has accumulated $600.00+ in prizes from them. For example, if you have won three times from a sponsor and each prize was worth $200.00, they may then send in a 1099 for $600.00.