Trying to make an Arduino shield, but I have a colision problem

[senso]

Good evening, sorry for the not so clear subject, but its not easy to explain with a handful of words.
So, I'm trying to make an Arduino shield, and so I have created a footprint that has the headers that will match up with the Arduino headers, but when laying out the pcb, Altium says that I have a colision with the componentes between the headers, because it assumes that the headers are a monolithic part.
Is there a way to circunvent this, or will I have to use loose header and align then in the pcb.
Image that will help understand my problem:

[senso]

Any ideas? (sorry for nagging  )

[gxti]

Same answer as for the other guy with clearance issues -- draw a 3D body and it will be used for clearance calculation instead of the bounding box.

[senso]

I will try to add 3d models of stackable pin headers and I will see if it solves the problem.
Thanks