I performed an advanced search today using an added criteria of job title containing "engineer".  The result brought up 319 candidates from my database of 2275 candidates.  I then mass-associated the first 100 results to a job opening.  Upon associating the first 100, Zoho took me back to 2275 candidates, not the 319 specific to the advanced search I performed.  I was attempting to mass associate all 319 to one job opening and couldn't do it as there is only 100 per page.