Weird results combination imlabel + imwarp + regionpros. Bug ?

Hello there !

I met a problem that was already asked, and I do need the answer. I did more thorough test compared to the previous post. Original post :

http://fr.mathworks.com/matlabcentral/answers/257850-different-results-for-centroids-using-regionprops-and-imtool-for-labeled-images

So, I did a test, and instead of having just a few points, I made a square 11*11.

Here are the two root images, left then right :

Here are the labeled image transformed and the root image transformed (looking exactly the same) :

And here (the interesting part), is what regionprops gives me for centroids of the labeled then transformed image :

My question is : is it a bug or is it me that is doing something wrong somewhere ? If it is the latest, could you tell me how to fix it ?

Thank you for reading.

[Walter Roberson]

Please post code.