Does any body knows why the Disk2 is always damaged (a CRC error is found in some zipped file in the Disk#2) created with DynaZIP?

This happens in different computers and even using brand new floppies.
(I remember that PkZIP 2.0k also showed that behaviour).
This only happens with spanned backups to floppies, zipping to hard disk is OK.

I contacted DynaZIP's thech support and they said that the error was fixed in the 3.00.15 version. I have the 3.00.16 but the problem is still there.