If you create styles using the the range distribution tools (such as Distribute With Natural Breaks), Cartographica automatically creates labels for these styles based on the ranges. However, if you are planning on using those styles in a Map Layout with a Legend, you may find the precision unnecessarily distracting.
This can be resolved by changing the Name of the style in the Edit Styles window for the Layer.
In the case of legends, the Name field will override the automatic generation of values for the Legend.