overlapping packets

Hello,

I bought Intel i210-t1 network card (kernel 3.3.4-5.fc17.i686.PAE Fedora 17) and compiled igb driver with PTP (Precision Time Protocol) option and with tcpdump command and -j adapter option captured traffic on that network card.

But even with timestamping on the card there are packet overlappings. The link to the capture file is:

https://www.dropbox.com/s/kl0i6s4s77w2wfw/ts3_src.pcap

For example for packets no. 564, 747, 920, 954, 999, there are overlappings with next packet in time. Do you know what is the reason for this? Regards, Milutin.