Child Support- recalculate child care using actual costs?

According to a consent order, my CS payment was supposed to be recalculated in May of this year based on tax returns. My ex and I did not negotiate an increase in Child Support until November. We still have no court-ordered increase of CS, I am paying the increased amount without an order.

For the 5 months May-Oct, when recalculating CS, would my ex be required to show her actual child care expenses for the period? My real expenses for camps were substantially higher than hers from May-Oct and would wipe out any increase in CS payments. Because my ex is now working, her child care expenses are now much more than mine and that does lead to an increase in CS payments.

If you agreed upon the new number and have been paying the increased support, the court will nto go back in time to make her show expenses.