There have been MANY listing sale days on eBay and every time Auctiva listings get the listing sale prices as well.
Sunny: have you checked your actual eBay invoice (in My eBay, click on Seller Account) to see if you REALLY did not get those special listing prices?
To my knowledge, Auctiva does not adjust their calculation of how much a listing is going to cost so on Auctiva it shows full price, but when it actually lists on eBay, you get the special price.
eBay literally only gives a few hours notice to sellers of such "sale" days, so it would be unrealistic to expect Auctiva to adjust their listing fee calculation method for a one day sale....