I have on different projects had to use Excel ActiveX. My experience is: avoid it, you will get into trouble. The troubles are not unmanageable but frustrating, especially if you need to support different versions of Excel, different languages/localisations, and even different installation options. Maybe you know that you need to use ActiveX, but if you do not, consider using for example a tab-delimited text file, which Excel can read.
LAVA I content is being (slowly but surely) migrated to LAVA II. That may be what you're seeing.
(Jeez! I nearly hit the "Manage Topic Poll" button again! Can't teach an old cat new tricks! )