Hi Gene,
There’s plenty of madness around, but creating multiple zips is not madness, but expected. By default, a “split” occurs onto a new zip every 500Mb or 800Mb, depending on when you installed UD (the default changed a few months ago). This is to prevent attempting to create zips with multi-gigabytes in by default, which many webservers can’t cope with. To change this, go into the ‘expert’ settings at the bottom of the ‘Settings’ tab.
If you’re not expecting that much data, then you can open the zips up to look inside. But, “others” is the stuff in your wp-content directory that wasn’t in wp-content/plugins, wp-content/uploads or wp-content/themes – so, that’s where it’s coming from.
Best wishes,
David