The good news is that the alignment of the text (horizontally at least) is a property that you can set. The bad news is that the examples shipped with LV don't expose that property. The good news though is that it's easy to add.
If you drill down into the report generation VI for appending tables (Append Text Table to Report), you will find two subvis a couple layers down. One (called headers.vi) is responsible for adding the header text to the report, while the other (Enter Row Cell Data.vi) appends the rest of the table. Both need to be modified. I have attached the versions I use.
When installing them be sure to make a copy of all the VIs that you are modifying and give the changed versions different names so they won't be overwritten the next ti
me you upgrade LV. You'll note I add a plus sign to the end of the names to differentiate them from the original versions.
If you have problems, hollar and I'll help you through the process of installing these VIs.
Mike...