C.W.
Frustrating isn't it? I also have a 4 yr old daughter and I'm getting the same disrespect. However the only difference between your situation and mine is I have my husband around for support.
I have to repeat things all day long to the point where I ask... "do you have your ears on?" Everyday is a difficult battle. Moms get the brunt of the bad behavior. She's perfect for daddy, my parents, day care provider & at school. I'm sorry I can't give any advice, I just wanted to respond so you know it's not just you.