Timeline for us -
May 2012 - Employer Nomination Approved - Aircraft Engineer, Avionics
Sept 2012 - Visa Application submitted
April 2013 - Told under new Visa Sub-classes our Employer Nomination does not match our Visa Application Stream - Cancel Visa Application and ask for refund
April 2013 - Re-submitted Employer Nomination Acknowledged
April 2013 - Visa Application submitted - 187 Temporary Transition - All documumentation/medicals included so effectively DR application.
May 2013 - Visa Approved - Original fee refunded
As much as DIAC can be a nightmare to deal with I have to say they pulled through for us in a way that was unexpected and a pleasant change from the apparent 'norm'. The CO was very helpful regarding the cancellation, refund and re-submitting of the Visa Application.