It works for me.
I created archives as follow:
Code:
\Test\Disk1\records.ini
\Test\Disk1\Setup.exe
\Test\Disk1\data1a.arc
\Test\Disk2\data1b.arc
\Test\Disk2\data2a.arc
\Test\Disk3\data2b.arc
\Test\Disk4\data2c.arc
\Test\Disk4\data3.arc
Each archive contains a single test file and after unpacking all 3 files are inside destination folder.