Specifically the way they operate the initial claim.
In short. DP moved in end of July and as such my single claim was changed to joint. For reasons I won't go into it was a HUGE mess and I have only just been paid. DP earned next to nothing in last tax year so we have been awarded the full amount. But this tax year he has earned around £28000 meaning the ridiculous sum that just slid into my bank account is hundred more then I'm entitled to. So I'll either have to pay it back or not get any more payments to the over payment has been 'caught up'.
Also I've been paid a rather large amount of WTC as well as CTC. Yet we have no child care costs as I don't work so both kids are home with me. (Except for dd attending the free 15 hours)
I'm going to call first thing to advise of his higher wage but it just seems such a ridiculous way of operating. He is salaried so it would have made more sense to tell the what he will definitely earn this year then go through this stupid system!