I have a BIRT report that works fine when exporting to HTML or using the web view, but when I make an excel file all the columns are reversed. The column that should be rightmost is all the way on the left and vice versa. I also had some weird issues in the Eclipse editor, where "insert a column to the right" would add one to the left (which then did end up becoming the right when exporting to Excel).
I'm using BIRT 4.5.0 on Eclipse Mars.