What I did:
- Create three plots A, B, C, and put two of them in a shared axis box (A, B)
- Tie the x-zoom for all three plots (Ctrl-t)
- Click on plot C to select it, then zomm right (push arrow right key)

What I expected to happen:
- All three plots should shift synchronously

What happened instead:
- While C shifts as desired, the plots A, B, with shared Axis, get shifted twice. 

I looked at the code, and found the problem dissapears, when I delete the following lines in method void ZoomCommand::redo():
foreach (ViewItem* item, _viewItems) {
  applyZoomTo(item, tiedX, tiedY);
}
Or equally, if I delete following from method ZoomCommand::ZoomCommand(PlotItem *item, const QString &text, bool forced):
_viewItems << plotItem->sharedAxisBox();


Possibly easy to fix, because_viewItems is not used in other locations. But I'm still not familiar enough with the code.

Manuel