The buyer relied on the LOA by JSA that the sig was authentic when making the purchase. Seems either JSA or the house should refund the buyer. The item pictured in the first post is in fact the same item that was in the auction.
Two submissions to JSA and two opinions. If their recent assessment is the right one then yes it is reassuring to know they are willing to correct a previous error but the buyer is now out some money. Do we know if JSA knew they had previously authenticated it for the auction house? If not then that shows how little credibility should be placed in an opinion.
There is an interesting thread
http://www.net54baseball.com/showthread.php?t=218934 on the main board about LOA's and their validity.