Can't sneak a ramp or cone in a box

I recently switched to kbm and on controller I found it easy to sneak a cone or ramp in a box, but I find it difficult to break a wall and then cone or ramp on kbm

It seems hitting them both binds at the same time doesn't work like it does on controller? Throwing me off big time and also happens when I'm trying to place floor and cones simultaneously

Not sure if this is a KBM thing or there's something I could do to work on it, it's very frustrating and feels like it's holding me back

Long story short placing two builds (separate types) at the same time isn't working, is there a fix or is there something I can do to get better at it?