Cutting depth for fastest cut

Hi, I’ve got a area which needs to be 2.1mm deep. If i set my cutting depth to 2mm, Easel will have to make two passes to get to the right depth. If i say 2.1mm cut depth it still seems to make to passes. If i say 2.5mm will this then make easel just make 1 pass?

Thanks.

Easel should just make the single pass if set to 2.5mm.