Las a guesstimate, you should have received between 320 and 330 a fortnight part a for two kids, so 26x330. Then whatever ftbb (will depend on how much the lower income earner received) - could be up to 140 a fortnight of youngest little person under 5, lowest earner under about 5k. Supplements of $726 per kidlet, 354 for the family for part a. Clean energy supplements (not sure of dollar values on that one sorry!). If you paid rent you could be getting up to 140 a fortnight for that as well
On top of that, if you have school ages kidlets you would have school kids bonus in there too, so up to 410 per primary ages child...

With two kids, if you are receiving full rate of ftba, ftbb and rent assistance it would be safe to say 600 a fortnight. So 600x26 is over 15.5k! Obviously that amount is dependent on lower income earner being under about 5k - if over that, you'd get less.

So yeah, I reckon a large amount going in the bank when you only earned 44k is probably pretty much bang on what it should be