HappyNow – Without knowing all the details perhaps the repairs were prioritised according to the most urgent need.
If you want all the repairs undertaken at once then why don’t you raise a Motion at the next General Meeting? The special levies will be higher if all repairs are undertaken at once which may cause some anxiety – however, as an option, your Owners Corporation may be able to use a Strata Loan. See the details re Strata Loan from Lannock Strata Finance at the bottom of this page.