It is incredibly common for couples going through a divorce to disagree on key points. Child custody arrangements and financial support are often hotly contested issues. It is also very common for couples to disagree about how assets from the marriage should get split up between the spouses. The more assets you have, the easier it is for a disagreement to occur.
It is a common belief that parents with a higher income have the advantage in custody proceedings. This belief, however, is not entirely accurate. While finances are one piece of a custody proceeding, they are not the decision-maker.