AutoCAD Dynamic Blocks :: Zoom All & Extents With Blocks Containing Fields On Layout Tabs

We have a new title block which now contains various fields to automatically populate the drawing number, number of sheets, issue etc.  The problem we have is when we go to zoom all or extents on a layout tab it moves the layout to the right each time.  If we only have one layout or we use a plain title block i.e. with no fields, the zoom works fine (layout stays put in the center).  This is also true if we directly insert a field onto the layout - again no problems. 

The cause of the problem only happens when a block containing a field is inserted onto the paper space of a layout and,there are multiple layouts containing blocks with fields.