I think the spurious symbols (Dec07) were saved under an old workspace. For some odd reason when I started NT today it opened in an old workspace format - and there were all the old symbols!
I re-started NT and selected my current workspace and deleted all the others (workspaces) that have been saved previously.This, I think has fixed it.
I have found that the workspaces behave quite strangely - sometimes I seem to get two opened concurrently and other weird stuff seems to occur with them.
anyway I'll keep an eye on data loading to see wether the old symbols really have gone.
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