No levies bill and a secretary who does nothing

Townhouse x 4. 3 owner occupied 1 tenanted. (3yr. old building, Builder de-registered – ASIC cert. obtained).  SM dismissed due to defamatory lies recorded in Minutes & overall ineptitude.

New SM employed 6th February 2014.  Extraordinary meeting held, Secretary, as elected at AGM Jan 2014). Minutes received.

Levy was due & payable 1st April; finally received Invoice for Sinking Levy Fund 28th April with reference number details to enable payment, however, NO Admin Levy invoice received to date.

Do we deduct sinking levy from total previously paid and pay the remainder as the Admin Levy (1st Jan 2014)?  None of us has paid the Admin Levy and wonder where we stand legally. 

Regarding the elected Secretary: Is elated to hold such a position but not elated about  her duties.  When asked to reconsider her position as Sec. she refused, (verbally). This tiny Strata should run smoothly however, the absolute inertia of the two other owners, (can’t speak for owner who has tenant), has us do any work on their behalf, including correspondence, permission to etc., common areas, gardens etc.

They  ‘just want to love peacefully’ i.e 3 monkey syndrome.

Really need advice. 

Many thanks