This might help from the Strata Management Act 1997
Schedule 2 Section 11
7A) Other limits on exercise of proxy
A vote by a proxy who is a caretaker, an on-site residential property manager or a strata managing agent is invalid if it would obtain or assist in obtaining a pecuniary interest for, or confer or assist in conferring any other material benefit on, the proxy.
So if he used his proxies to extend his term the motion was invalidly passed and so would a lot of other motions, depending on how active he was in using his proxies.