I am making a mold it has a contoured bottom (hills and valleys). I'm able to clean out the bulk of mold fine using a z-level rough and two planar strategies. The problem I'm having is cleanning the side walls of the mould. I'm using a profile cut and it cleans up the sides beautifully, only it cuts right through the contours on the bottom. I've set my depth of cut to the lowest point. How can I get it to follow the bottom countours?

I've attached a picture showing the tool just cutting the profile to 1.0625" depth which is the lowest point but it doesn't come up when it comes to a protrusion,it just cuts right through it? I've extracted a wireframe from the bottom and selected that as well as the top profile wireframe as geometry and it still just chops right through the part.