My question involves child support in the State of: new york

My ex and I have a six year old child. We split our time with her evenly. There is little difference in our incomes. I have always paid support ever since she broke up with me a few months after I caught her cheating. However, I've always had my daughter as much as she has and her rates that she considers fair have sky rocketed. I used to pay $250 a month to cover her insurance and then id pay for extras like clothing or doctors visits. Then it changed to $470 and now it's at $400. I provide all the necessities for my child when she's in my care. What I really want to know is, is it possible to actually split all my daughters costs down the middle or do I have to pay for everything from here on out? Also my ex recently moved out of her mothers to a more cost efficient area so I moved into my daughters school district to make sure she stays in a good school. Now her mother refuses to give me her new address. I find it strange that she's not willing to give up this information because she's is always well informed to where our daughter is and my new address. Can she hide my daughters address from me?