Temporary support is that amount ordered for the pendency of the divorce action. Rather than rely upon the computer calculation, the court must consider a variety of factors including the needs and eduational levels of the parties, age, tax effects, retraining or occupational needs, health, and the length of the marriage, to name but a few. Child support is not tax-deductible to the paying party. Spousal support generally is. This is a bit tricky to accomplish though and you should let your attorney or the court work that out for you rather than trying to do it yourself.
Child support is calculated based upon BOTH parents incomes and timeshare with the children.
If the higher earning parent has custody of the children, that parent may still be ordered to pay child support to the other parent so that the other parent will have the money to provide for the children during periods of visitation. Very bad things. Your assets can be attached, your real estate liened, your bank accounts frozen or taken over by the marshall to collect the support. In the most egregious circumstances, you might even go to jail. But it can alter the order so that future amounts set take into consideration your circumstances.