Yes it took me ages to describe my problem in the least confusing way.
What happened was I inherited the project and had to redigitise 50hrs of logged material. Only, when it was last digitised (and the media subsequently lost) it was digitised across timecode breaks, so when it finally came to me, i found that because of this there was often not enough pre-roll on tapes, and i would have to manually redigitise clips with different in/outs. So anyway, relationship now gone between source media sequence clips. multiply this by many, many timecode dropouts and many manually redidged clips, a re-offlined sequence from someone with new master clips (and names), no more deck available, and you have my sad state of affairs. I just want to cry.