This example reminds me of just how much I hate tables! No matter how meticulous your logic, or how much care and precision goes in to the formatting, using tables there is always something that drives you having to use a crowbar to get things to display as they should.
In the third column of the top table, place your cursor in the third column anywhere under the the 'share' graphic.
Right-click and select 'Table', then 'Split Cell'.
Select 'Rows', and '2' for the number of rows.
The annoying bit: Make or find a 1px by 1px transparent gif (you probably have one in your site files) and slide it in to the cell below the cell that now contains the 'Share' image.
Select the gif image, and in the Properties Panel (properties Inspector) give the image a height of 70px (leave the width at 1px. You may have play with the height of the transparent gif until the page header looks like your other pages.
Hope this works for you!