I don't use the Word export formats very often - only when I'm working on a prototype and I need to include the report layout in the functional specs. However, here are some suggestions.
Alignment - to prevent column alignment problems in Excel, I do use a cross-tab if possible. If it's not possible, I do the following:
1. Align the left sides of all of the objects in the column - heading, data, footer/totals.
2. Make all of the objects the same width, even if most of it is going to be blank.
3. Avoid headings that are more than one line unless ALL of the headings have the same number of lines.
This technique may also work for the Word export.
Line Spacing - don't include extra space in a section below the bottom of the objects. Avoid using lines. If you're using a cross-tab, you'll get extra space.
Good luck!
-Dell