pip paid too much?

I am in a real quandary. I am appointee for a relative who is on the autistic spectrum and filled in his PIP assessment form. Previously he was on the lower rate of DLA. He has been awarded enhanced daily living, which I am very happy about and comfortable with but - he also been awarded enhanced mobility. I wasn't going to even fill the mobility section in as he has only slight problems with that - walks slowly, anxious about going downstairs, has some problems with proprioception, finds it very frightening when the pavements are icy. But a friend encouraged me to fill it in as she has seen his behaviour and on the basis of "if you don't ask you don't get"! Unfortunately I didn't photocopy the mobility page as my printer packed up at that point so can't remember exactly what I said or even which box I ticked! But it would have been along the lines of needing someone with him to help. But it doesn't add up to enhanced mobility needs at all. So I can only think that the assessor didn't read what I said and just looked at the tick box which may well have been the "always" box, ticked on the basis that this is a permanent feature of his condition. But not expecting to get anything!

So far I have only told my relative about the daily living award as I have been so perplexed about the mobility component. But I woke up this morning realising that I would like to get this cleared up before he finds out - the money is paid into his own account and he is not going to be at all comfortable with the extra amount. But if I phone the DWP they might look again at the whole form! It is perfectly possible that this assessor simply looked at the tick boxes throughout - another assessor might be more thorough and decide to throw out the entire award!! I wish now I hadn't told my relative about the daily living award as if that happens he will be devastated, but it is too late now.

Do I need professional help on this? And if so, where can I get it?

A big thank you to this site for the help you give which helped me fill in the forms - but I cannot relax yet!