i just realised that my ftb payment has dropped and has since january. went and checked online and both FTB a & B and rent assistance have dropped. i did get a new csa assessment in nov/dec as his amount went up. ive always been on min assessment so would the amount CS went up make my FTB a&b and rent assistance go down??
highly likely this is exactly what happened

c'link/fao have a system in place where, if your CS assessment goes up and you're likely to be overpaid, it will drop the amount of ftb you get. firstly, it will drop it by the amount you're supposed to be impacted (so if it's 30 a fortnight, that's what it drops by) - it will then look at your CS amount as an ANNUAL amount, and if there are amounts you have been overpaid in the early part of the year, it will adjust your remaining payments to stop you getting a debt at the end of the year

hope that explains it

BG