To the point they seem useless?
I am a carer to my son. H works full time for 30k a year. I also have a 3 year old little girl
Turn2Us and entitled to both say roughly the same thing. That I'm entitled to claim and it would be £1300 or around that a month!
I'd be terrified to be overpaid if I claimed that 
Why are they so inaccurate? I get that it can't be 100% but googling previous threads makes me suspicious that's it's more often the rule than the exception that they're wrong