Having issues with iPad/iPhone and Mac and multiple entries in iCal and contacts.

[Gostrydr2006]

Having issues with iPad/iPhone and Mac and multiple entries in iCal and contacts. Contacts loses all groups when synced to the iPhone but not the iPad. I have made sure evrything is correct on the Mac at this point (all duplicates have been removed and such), should I delete everything on the cloud and perform factory resets on the both iDevices? If I do the resets should I NOT have them sync contacts and calandars thru iTunes when I restore all the apps and then just enable iCloud on them and let them pull the contacts and cals from the cloud? Thanks
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[DefBref]

Are you currently syncing to icloud and using itunes to sync calendars? That would explain the multiple entries, you should pick one method and stick to it.