Text links don't work right when they span two lines. You want to make the text a "graphic of the text". To do this, group the text with itself - just select the text and hit ctrl-G. The text will no longer export as text, rather as a graphic. the line span will work in this case, but you will need to do whatever "highlighting" you want to do manually by copying the text to the mouseover layer and making the changes you want when the mouse goes over it. IOW: it won't use the "website settings" for links.

Does that help?