I made some omissions on my 'How Your Disability Affect You' form. Then I made a mistake in my letter providing new info for a mandatory reconsideration. I couldn't find anything about this in the guides, so when I wrote my appeal I corrected the mistakes and apologised. I also said I'd made the mistakes because I hadn't had adequate help with the claim because my usual helper is ill. My mistakes are trivial compared to the ones the DM and assessor made. I don't think the DWP can reasonably say that it's my fault that the award decision was incorrect.