Currently a small bug makes the restore to read incorrectly names of PIM lists containing non-ascii characters, e,g, "Calendar Poznámka"; as a result, entries from such a list will be stored to the default PIM list for that record type (usually Contacts on mobile and Calednar events).
The fix is to reread the name using UTF-8 instead of ISO-8859-1.
WORKAROUND
Switch your phone's language to English prior to backup and/or restore, this will also change the names of the lists - at least on Nokia 6300.