Why is a contact app on my Samsung Galaxy Note 3 duplicating some contacts and deleting others?

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AC Question

contact app on samsung galaxy note 3 is duplicating some contacts and deleting others

problem started recently where I was losing some of pictures of contacts and then starting losing some of the contacts - after trying to delete all contacts and importing from outlook with pictures reattached, I am still losing contacts and also now have situation where some of the remaining contacts are duplicating themselves. also, one particular contact can not be deleted - either by touching that contact - no delete option is available - nor by going to menu button when on contacts and trying to delete from there. I have removed battery to see if soft reset works with no luck.