Landmark problem

Hello 
I am a GMP student, I have to make a "grasshopper". I first created a skeleton with all my parts and landmarks. Then I created a piece and I shared with him the landmarks I had made before. The problem is: when I insert this part and move it, it doesn't return to the original coordinate system. I should point out that I normally set my benchmarks well. 
Thank you for your help (From red to blue on the capture)


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Could the problem come from the fact that the play is not in context?