The first image is the layout that I initially created. I selected all objects copied them and pasted them on 3 other layouts. All three have this offset to the left.
I DID look at the inspector and every object starts at 0 left 0 top; besides, it is not only the objects that are offset but the layout parts themselves. All the objects locks are the same, sizes are all the same. Nothing of that shows in Layout mode. The window is always maximised.
I could duplicate the original one but you may notice that it doesn't autosize like the others do and I don't see what the difference could be. The subscreen form does autosize and the mainscreen list view does also.
Above is the original Form layout which nav objects were copy pasted to the other layouts. it is not offset but it doesn't strech.
Below are the List Layout and the Sub Form Layout, which do strech but are offset.