Hello, out there

I have a problem making a multiple configuration part.

I will describe in words the example I made to illustrate this.

• On the Right plane I made a sketch, a dia 6 units circle;

• Extruded sketch 30 units;

• Went to the Configuration Manager and renamed the Default configuration as Ø6x30;

• Added a new configuration, called Ø6x40, which became the current one;

• Went back to the Feature Manager, double clicked my part and modified the length of the extrusion to 40;

• Changed the current configuration (called Ø6x40) to Ø6x30

• Double clicked it to show its dimensions. Length is 40 instead of 30.

Does anyone know what's happening?

Thank You.