Is it normal the house can't be cleaned?

My mom wouldn't know how to organise her sock drawer let a lone her house. She has my little sister for 3 days of the week and is incapable of keeping a leveled head about it for even 72 hours. I've stopped house work as just a masses huge piles of stuff everywhere and if you clean it or move it then she will throw a fit she can't find something. Then she becomes infuriated the house is so messy and uses it as an excuse to stay out and not do stuff as it is too messy. After a couple months she started to clean so I re-ogranised the furnishings so she'd have more space and it'd be more visually appealing as more stuff is being added all time. Then now she quote "The house cannot be cleaned when you she is not here because her stuff is lost and she is punished for it." The item was a piece of clothing, pajama bottoms which she has known for weeks she has needed. Yet my sister left on the floor over a week ago and that became the rightful home. So in the mix moving things around my mother had picked them up and now they're no where to be found. Which when she came up with that line as they were left there for her to pickup.

A. why would she be punished for something her mom does?
B. I understand re-enforcing proper action but she should have picked them up at the time of doing so this is how the house becomes so messy as mother like daughter so glad I broke away from this bulls***
C. Now she has an excuse for the house to become messy and when she is here those 3 days she will "too busy" to ever do anything when all she is spending that time doing is yelling no joke
D. Why does she only have on pair of PJ's

This is day 2 of her yelling about this, and it will not stop till the item is found and she is the one being punished for it.

E. why can't she just put stuff where it belongs and be done with it.. like she encourages my sister to continue stupid habits because it is too much effort to guide her so let her do what she wants and tell her everything in the house belongs to you this your house so her level of self entitlement goes through the roof and you can imagine what that is like so then again you can see why when something is a miss its her house she can do what she wants.. leaving it out isn't to teach her later its because she can do what she wants because my mom is tooo lazy

thoughts an opinions please my sister is special needs and she really desperately needs guidance I've gone to the courts in the pass regarding the abuse of my eldest sister and nothing resulted the father grows frustrated because she is taught to be an idiot here so his attempts are futile and he has her most of the time. Neither of them are ideal parents he drinks and becomes abusive, he just general sense from a day to day perspective in no regard a parent but can keep a house clean. I would want my eldest sister to take custody.