Yes, it's wierd that YJ lets the seller to drop 
the top bidder and sell to someone else.  And it 
just happened to me today.  Someone out-bidded me 
on an auction, and I thought...oh well, I lost 
it.  Then the seller cancelled the top bidder for 
unknown reason, and decided to sell it to me.  
It's alright to me, but the problem with YJ is if 
I want to buy that item, I have to pay the 
maximum bid that I put down earlier.