Thanks Rob,
It looks like the reason there's no Match events showing is because there hasn't been matching events since 8/4 and I added that controller yesterday:
(controller) #show ap arm client-match history
ARM Client match History
------------------------
Time of Change MAC Reason From (Radio/AP/Signal(dBm)) To (Radio/AP/Signal(dBm)) Status
-------------- --- ------ --------------------------- ------------------------- ------
2013-08-04 18:18:46 11:22:33:44:55:66 Sticky d8:c7:77:88:99:23/58.3.8-mas-deroy-second/-82 00:24:6c:44:55:66/58.3.4-mas-deroy-second/-63 Fail/00:24: