Strange Behavior with Remove Component

[rockn]

While I was experimenting something to modelise wood assembly, I don't understand the behavior in this model.

StrangeBehaviorwithRemoveComponent.png (286.08 KiB) Viewed 1107 times

StrangeBehaviorwithRemoveComponent.fcstd

(24.99 KiB) Downloaded 30 times

So I have two basic Arch Structure object, one is perpendicular to the other.
I merged a file with a "wood machining", it's composed with a box, a pad and a draft.
So I add draft component to Structure, and i remove the same draft component to Structure001.

But the soustraction is not right placed. Do you know why ?

[rockn]

Oops,
OS: Ubuntu 14.04.1 LTS
Word size: 64-bit
Version: 0.14.3702 (Git)
Branch: releases/FreeCAD-0-14
Hash: b3368125c63289ec8ce9faec2b2ae4c78d436406
Python version: 2.7.6
Qt version: 4.8.6
Coin version: 4.0.0a
SoQt version: 1.6.0a
OCC version: 6.7.0

[rockn]

Ok, I still experimenting different ways to make thing strange depend on how the component we want to remove is made.

StrangeBehavior02.png (280.56 KiB) Viewed 1093 times

StrangeBehaviorwithRemoveComponent2.fcstd

(33.1 KiB) Downloaded 29 times

So:
Extrude from Sketch (sketch is displaced) : Ok
Box displaced : Problem
Extrude from Draft rectangle : Ok
Protrusion from Sketch (sketch is not displaced but line in sketch are where I want in the whole model) : Ok
Protrusion from Rectangle : Problem
Protrusion from Sketch (sketch is not in its initial Place) : Problem

I think we have already discuting of that in past, it seem that sometimes FreeCAD take the original placement of object (that is in origin).
It seem that extrude always work, and i believe that if we want an object that is sketch based we have to not displace the sketch, but draw profil at the position we want in the sketch plan.

Can we fix that, or have we to explain in wiki and in mind that there is some method that are not allowed to use with Arch wb ? that the question ?