To obtain access to a hot patch with the fix for this problem, follow the instructions in KB 3469853 "Updates to Novell ZENworks 7.2 Linux Management" which can be found at https://www.novell.com/support
But if both syntax are correct then the name of the catalog should not be relevant and zlmmirror should be able to perform everything defined in the xml file whether it is:
1. To have multiple catalog sections each with a single architecture -
2. To have a single catalog section with multiple architecture specified.