If that's the way it looks in Excel and CSV, then perhaps there's a
problem with Juno exporting them. This link
<
http://mail.google.com/support/bin/answer.py?answer=12118> talks
about how to export from several different vendors, but Juno's not on
the list. I'd suggest you check with Juno help to see if there's a
way to do it that you're not using.
Alternately, work some magic in Excel while you have it open, and
re-save it as a CSV so the import will go smoothly.