Auction Prices

hello. I'm not sure where exactly to post this, however I play on Lordaeron? server, and I noticed while putting things on auction that the prices were changing as the items posted. Ex: 20 light leather bid price 18 gold buyout price 19 gold. When they listed however they listed at 30 and 40 gold. Am I missing something? Any assistance would be greatly appreciated. Thanks

I logged back in today, and placed items on auction and the prices stayed where I put them this time. So, obviously just a bug.