After importing an XML file and prior to recapturing it, it is strongly recommended that you consolidate your clip in Flame. This ensures that you do not capture all the extra media that was likely captured during the offline edit. This step should be performed even if a similar process was performed in FCP.
You can consolidate clips in the clip library. See Consolidating Clips in the Clip Library.
In general, it is recommended that you use the All Tracks option, available from the Consolidate option box, to consolidate all segments of an unlinked clip. See About Managing Media on the Timeline.