They did the same to me for the following two trades on bitcoinmarket.com :

Buyer ID    Trade ID    Currency Pair    Price     Amount    
5810    2588    BMBTC/PPUSD    25.9900    11.0000
5810    2493    BMBTC/PPUSD    26.9900    10.0000    

After I confirmed receipt of payment, within a couple of hours of receiving the notice from paypal that the payments were disputed I emailed the admin at bitcoinmarket.com but never heard back. I received payment in the evening (US Central Time) and 1 hour later the payments were disputed.  The reason for the dispute is a claim that the transactions were unauthorized.

Paypal already closed one of the disputes (in his favor) without even waiting for my response.  Their initial email indicated I had 7 days to respond, and had to do so by fax since each transaction was >$250 USD.

I wish I would have known about the feedback section on bitcoinmarket.com!  If I had seen the users past history I would have been more cautious...

his username is petraki85
paypal address is brice.delannay@gmail.com