Samsung Galaxy S6 phone contacts disappear

[AC Question]

I've spent over an hour entering phone contacts in my Galaxy S6. After a while I noticed that some I had entered were not listed. A short time later I found that all but one of my phone contacts had disappeared! What is going on?

 

[B. Diddy]

Welcome to Android Central! Which account were you saving the contacts to -- Google, Samsung, or the local Phone account?