If “Z Hop When Retracted” is enabled and Skirt or Brim is used then only half the number of layers i shown for the sliced model.
All layers are in the generated gcode file they are just not shown as layers in the window. The complete number of layers is halved in window and the first half of the layers are shown in layer one. Layer 0 only shows the Skirt or the Brim not the model it self.
If you are using Raft of None then the number of layers is correct.
It is easy just to see enable or disable “Z Hop When Retracted” when using Skirt or Brim.
The time and how much filament will be used is the same and correct.