Hi,
You can try playing with css. You have defined css classes on each cell, so you can create a css definition in your template css file or in /components/com_grid/css/grid.css
To find out which class is defined on the element you can use a tool like Firebug in Firefox, or in Chromium just right click and "Inspect Element"
In your case the css class for the cells that make problems is tableJX2eventinfo
So I think if you define something like
.tableJX2eventinfo{display:block;}it should work already.
