Well ... it seems that is better give 7 seconds instead of 4 to avoid loosing auctions .
I've lost a bargain today but that was because I were overbid and AS were very well and placed my bid 5 seconds before the auction end .
It's seems that the things are back to normal (I hope) .I was so desperate that I have registered in another site a few days ago but had a single bad experience (bid was placed 1 minute before the ending ).
Thank you all for the support
AS all the way !