Maybe, i know of a few people that have done something similar -

They have split their pay though, so one week they get Part A and the next week they get Part B so they actually get $ each week - if that makes sense. Helps them to budget better.

Although that isnt the same thing i am sure if you can ring Centrelink again they will be able to help...

Goodluck - BG will probably be able to pop in and answer this for you - she is awesome with Centrelink advice !