I agree with your confusion. Sellers though,should not leave positive feedback with negative undertones even allowing for the fact they would almost certainly have issued UPI's and blocked the culprits. Sellers are simply becoming frustrated at the number of frivolous or serial non-payers which seem to have become a protected species in recent times. It is the lack of remedial action by eBay which is a very real concern. The number of non-payers in recent times is alarming.