When changing the price you can do three different things with the debt to retain the mathematical certainty that Price = Down Payment + Debt:
1. Retain the same debt amount and change the down payment
2. Retain the same down payment and change the debt amount
3. Retain the same percentage of LTV, Down Payment
By default when you enter a new price directly into the Price Data field, nothing changes on the debt level because it does not know what you would like to do relative to changing debt or down payment amount. Use the Price Analyzer to change the price and then select what will happen for debt.