Changing a current RCI ongoing search

I have some searches that I put in that will be ending with no more than likely no match. When I try to change them I must be doing something wrong because I end up with a whole new search going plus the original search. I don't want these "head of the list " searches to disappear. Can someone walk me thru it or should I just call an RCI rep? Also I was wondering if I call RCI and have them make the changes, do they become RCI assisted exchanges at the higher rate?

Thanks for any help or suggestions.

Changing a current RCI ongoing search