I Suppose I am a Meany

We have a small house with 4 kids in it, 2 adults, the belongings of our adult child, who moved to another city, a workshop, the contents of an art studio and an office, besides the normal bathroom (only 1), bedrooms, kitchen (no cupboards) and ancient garage (1-car, no door). If we don't keep things in place, or at least in the general areas they need to be, it becomes hard to get around, get dressed, and even harder to find anything.
The 3 youngest children came from a home where there was simply no order or cleanliness. Since they've been gone from their mom only 16 months, I think a sense of disorder gives them a sense of "home" that they subconsciously cling to. Plus, they are kids.
Recently, we reconfigured their rooms so there would be a place to put everything. On the youngest's drawers, we even labeled what ought to go into each one. He likes that a lot. He's become much better at making his bed. They even have their own laundry bags and do their own laundry at times.
The oldest is usually blind to any room issues. He can claim that he "never knew!" he was supposed to pick all that stuff [sister's shoes, his socks, brother's sandals, wee cars] up off the floor! What??? No one told him! No one told him he would have to put his clothes into a bag or basket and not scatter them all over once ready for cleaning. Poor, uninformed kid! Of course, I told him this many times, nicely, yelling, writing it down, but he is woefully uninformed.
The little girl just arranges things, which I totally understand, since I did that myself as a child, and truly thought this was the correct thing to do. It was unbelievably time-consuming, but it was also satisfying and developed my sense of design. I "cleaned" my room for hours. It was never done, and is not to this day. She still has to do the job, and no doubt does the usual tricks like jamming all her clean clothes into the laundry room as "storage," and shoving stuff under her bed, "forgetting" the stuff jammed in at the headboard, etc.
The worst part of this is that after I try to get them to make their beds before they leave for school, which they generally do, I ask them to pick up before they go to bed- well before they go to bed, like at least an hour. This is where they go deaf and I have amnesia. When it's time to tuck in, be sweet, give backrubs and kisses, read stories or say prayers to these guys, it's more like they get a visit from their worst nightmare. I am shocked that there are socks under the bed, clothing left right where it left their hands, games just where they were 3 hours ago and that the little angels have not been getting PJs on as I so foolishly imagined, but are huddled around a Gameboy [illegal! illegal! illegal!] behind someone's bed, in full daytime dress, maybe minus shoes and socks, with hip-hop playing in the background. I have no power after dinner, except for my voice, I guess, as well as my talent for hiding the DS in a new spot (my favorite being in their own room) while they endure a time without it as consequence.
I just hate yelling at them right before bed. "What were you thinking???!!!!! How could you think this is what I meant by cleaning your room??? I love you sleep good see you in the morning." Good thing they get amnesia overnight.