Saving number to existing contact = problem

[THE-COPS]

No, when I click on his name... or A CONTACT in my list,instead of opening THAT contact, a blank one opens (actually, the funny thing is, it is like for a SPLIT second I can see his contact card open but it's gone in about 1/32 of a second ..I found out by repeating the save to option several times). No names, numbers or other info. And yes, I have tried saving the number , an it just creates a NEW UNNAMED Contact at the top of my list with that phone number in it. I have NO idea why it is doing this. So, I have to try to remember the number (or write it down) in order to add it to an existing contact. Annoying...