searching results

I have a client that is getting different search results with the same search criteria.  In HP RM 8.01 full client the search result is over 500 while using HP RM Webdrawer the result (same authenticated user) the results are around 50 and using WebClient Classic the results are around 400.  Anyone experienced this type of result change.

One more issue if they use a comma in the search string in the full client they get an error about empty space, and on webclassic similar error result, but webrawer returns results.