Hi jojo2507
Welcome to the forum.
You might want to have a look at the following FAQ which explains where everything is;
www.benefitsandwork.co.uk/guides-for-claimants/faq/forum You can earn up to £132 a week before your CA is affected.
CA is non-contributory. It counts in full as income for means-tested benefits, it is an overlapping benefit.
I am not sure where DWP get their figure from, I would advise you to seek help from your local Welfare Rights Organisation who will be able to take all your circumstances into consideration; you can find your local Welfare Rights Organisation to help you with advice by clicking on the link below and putting in your post code, it will then come up with a MAP with a list of agencies.
advicelocal.uk Gary