Oh for pete's sake. Geez, when SD was with us last summer, she apparently didn't have any pads with her and was embarassed to talk to her dad (she isn't any more) so her mom told DH exactly which type of pads she used, not only the brand, but this or that type with this or that wings. Then I went to buy them, scouring the shelf for that particular kind. She knows she can come to either of us, but unless money were really an issue, why wouldn't the child be allowed to use the type of pad they are most comfortable with? I went to buy her more recently and didn't see the type I thought I recalled and so just waited to buy them so I could go home and write down the exact kind it was again.
And, now for the "which hill to die on" advice ....
I realize we can't control everything about another person and all that. But, it makes me ill what these children are being put through on the one hand and then they are supposed to bottle it up and not get disrespectful or whatnot when they are feeling frustrated.
Frankly, I would take these situations up in court, especially since you are already there over all the contempt stuff. If they're going to be stupid about not returning clothes, request the judge put it in the order that they must. If they are dressing down the child for bringing anything from home, request the judge put in the order that the child may bring things from one home to the other and that it should be returned.
NOT sending a child with anything that's theirs is something alienating CPs like to do, to make a child feel like a fish out of water in their other home. For a NCP to refuse to accept those things into their home is not nice. I could see if it were video games, cell phones, etc. -- things that distract or whatever. But, to have a policy like that? That's manipulating the other parent through the child and I would most definitely bring these things up in court.