Only displaying partial results

When I perform a search on a partial last name I receive 3 results when there should be 7. However, the the found count display is correct, "Results 1 to 7 of 7 for: XXXX".
Any thoughts on why I am only seeing a fraction of the results?
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Kevin Ayers
Assistant Director for Engineering Curriculum Laboratories
DECC Labs/College of Engineering
Drexel University
Any thoughts on why I am only seeing a fraction of the results?
--
Kevin Ayers
Assistant Director for Engineering Curriculum Laboratories
DECC Labs/College of Engineering
Drexel University