I know this sounds like a fake problem, but I'm getting a little bit concerned about DS2. He's 18 months, and is getting very distressed if things aren't put back in the right place immediately. He's always been like this - one of his earliest words was "back" as in to put back - but it feels like it's getting worse. I'm sure there's some genetic element as DP is very tidy and gets distressed by mess, and DS1 will happily tidy his bedroom after friends come over and take all the toys out because the alternative is sleeping in a messy room, but DS1 was never this bad. DS2 was also very premature (27 weeks) and I know that's linked to ASD, so I wonder if there's some element of that in play.
Examples: you can't take a stack of books out of the bookcase to read to him, it has to be one at a time. If he's finished playing with a toy outside it needs to go immediately back in the shed, it can't be left out while he moves onto something else. If I get a cloth to wipe up a spill on the table it can't be left out for the inevitable second spill, it has to be put back in the kitchen.
Sometimes I'm going along with it as it's not worth the levels of distress he's reaching, especially around food when he's low centiles and under the care of a dietician. Sometimes I'm explaining why something isn't happening immediately and letting him be upset (e.g. "I'll open the shed once I've hung up this washing, but I can't do it right now. I'll put it back in when I can).
I guess my question really for anyone with similar experience is what is the correct approach? This morning I was up to get a cloth because DS1 spilt some milk when eating his cereal, then had to take the cloth back. Then had to get the cloth again because DS2 managed to unstick his bowl and tip it over and covered DS1 in milk, then had to take the cloth away. Then had to get a cloth again because DS2 decided that actually the milk that he'd been happily poking with his fingers had made his hand wet which he didn't like. The third thing I found particularly annoying as I knew this was the inevitable conclusion, and so I wanted to keep the cloth out!
Sometimes I think he's 18 months and his distress is real and opening and closing the shed door is not a big ask. Sometimes I think that actually I should be helping him cope with the situation rather than fixing it.