Your problem is Records.ini
Code:
[Record2]
Type=Freearc_Original
Source={src}\Data.Bin.002
Output={app}
Disk=2
Remove this Record2 and it will work.
If you use DiskSpan you just need to add first part of an archive (no matter how many splitted following parts this archive has).
DiskSpan batch files will make a Records.ini automatically, therefore you don't need to do anything on this file. Only exception is if you create more then 1 diskspan archive. In this case you have to add all first parts to Records.ini