Duplicate and meta collections

Hi there,

I know there have been similar posts about this topic but i think this issue is slightly different.

I have 2 collections (regular-content and staff-information) under a meta collection.

My problem is that I have duplicates appearing in the results but the duplicated content is only in the regular-content collection.

I have the crawler.eliminate_duplicates=true entry in the regular-content collection cfg file but no luck - duplicates still showing.

Any suggestions?
Henry