Guesty offers multiple ways in which you can manage and control your rates.
When you create a new listing, you initially set up a base price and default minimum nights for your listing.
If your nightly rate or minimum night values are different from the ones set up on the listing level, it is probably caused by pricing and availability tools overriding your previous configuration.
Also, changing a listing type to a sub-unit (of a multi-unit) will cause it to inherit the settings of the multi-unit's parent unit by default. Any price adjustments made to the listing will be overridden by the current pricing of the main unit.