Please see the 3D preview — I don’t believe this is doing what you want due to overlapping paths — see: Creating designs from elements for an example of a problem caused by that.
Unfortunately, Carbide Create won’t depth limit, see https://wiki.shapeoko.com/index.php/Carbide_Create_Basics#Clearing_area_around_drawing and the linked page: V carve + inside pocket? for work-arounds.