It's called executive function disorder, and is common amongst people suffering from schizophrenia and schizoaffective disorder.

When I'm poorly I find it hard to track my thoughts and organise my behaviour. For example, I forget to put out the bins, start cooking, then forget there's anything in the oven (thank God for fire alarms). I go with my bank card to the phone to pay my bills, then forget to. I'll start writing a letter that's vital to do with my benefits or debt, and realise two hours later that I'm staring at the wall. Housework suffers as well... I start doing the dishes, then the phone rings, and after I've hung up I've forgotten what I'm doing. I'll draw a bath and forget to turn the tap off, and come into a room swimming with hot water.

In the past I've been able to study in depth and learn new skills, but even then I struggled with organising my time and finances. Even on my meds, which have really helped, I still struggle in this area.

sometimes in a crowded venue it becomes very difficult for me to process what people are talking about, and I'll shut down. I have to force myself to interact with people, and the result is that folks think I'm aloof and uninterested. In fact the problem is that listening to all those voices (not to mention my own) feels like there are lots of radios on at the same time, and I can't tune out any of them.

Is this the kind of thing you're talking about?