Reply received on my UC Journal says it all really

Poppy123456. I was paid ESA CONT which was topped up with Income Support totalling £500 a month.

 I was also paid £500 a month Child Tax Credits from HMRC. Grand Total £1000. 

I can't see why this is confusing. You can get Income Support topped up onto any benefit if you qualify for it which I did.  

It is irrelevant now as I was placed onto Universal Credit which left me £300 a month worse off.