Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
It sounds to me as if you need either or any of these:
1. occasional backups of your contacts information, to another device or devices, or to the Cloud perhaps.
2. tagging of older, vs. newer, clients in the list. Or, ranking, or separating, or sorting. (I don't know precisely where or how your list / contacts are stored. If I did I could go into more detail with my suggestions.)
3. a new 'kik' (whatever that may be. I confess I don't recognize what device that is. But, if it is unstable enough to reboot or reinitialize occasionally, it may be marginally defective.)