Q15:After exporting recognized contact, why I cannot find contact information on the iPhone?

Answer:

if you have more one contacts account, we suggest you set iPhone contacts as your default account. When you export the data to contacts, please use the “Unfiled” to export. If you want assign a group, we suggest that the group must be created from iPhone contacts.

That is apple SDK limitation of defining the contacts database. Regarding to the issue, we have reported apple and waiting for his feedback.