Action button windows with forms loading with large white space on the right

Action button windows with forms loading with large white space on the right

This happens quite alot with deferent forms I'm opening for filling out. My form is jammed on the left half and white space on the right half.

 If I go into the delveloper tools elements inspector of my browser, I find the Table containing my two column form <td> tags, but also this third <td> tag.

<td elname="zc-formTableFix" style="vertical-align:top;width:99%;">&nbsp;</td>

If I remove this tag using the browsers developer tools window, the form than looks correct.

Question, Why is Creater adding this third <td> tag with this "zc-formTableFix" tag that, in fact breaks it? Why set the width at 99%

Some forms do this, other don't. I can't figure what causes creater to insert these tags

Please help
Ted