Sounds to me like they’ve made a mistake and not put you in the protected group kezo as that’s the only way you can stay on cbesa after 12 months as then you automatically get switched to ibesa. Pip and esa are two different benefits ones as you cannot work, the other dla/pip, is help with your condition, which there are 2 elements care and mobility. Pip/dla though should not count towards any income. I remember when they switched me over from dla to pip it took almost a year and my allowance for care was increased due to my condition getting worse. It didn’t get back dated to when i made the claim for pip as it would do if you applied for pip and was not being switched over. My mum had dla and then became a pensioner so the mobility part she still got but when switching her over to pip they removed her life long award (she got awarded after she took them to tribunal) and said that she no longer qualifed for the mobility part as she was not of working age, she had started to suffer a bit of dementia, no one really knew much until my brother got a letter from mb about taking the car back. shocking really how they treat people with disabilities and seeing as i got runover when i was 9 i’ve had virtually a life time of problems since and having to deal with the system.
I didn’t think the DWP could move a claimant from DLA to PIP if they are over pension age, PIP is only for people of working age.