You are going about this the wrong way entirely, you need the XDCam HD transfer utility from the Sony XDCam site which is Free, you then set your firewire output on the camera or deck to FAM and hook it up.
Then when you go into FCP you get the option of XDCam in the “import” menu when you select this the XDCam Transfer utility opens and you can select which clips you want to import, this is a faster than realtime transfer and works very smoothly.
Then all the clips will work perfectly as long as they are the same datrate as yoour easy setup.