Custom Tab Issue

Per my boss, Ken Vaughn (Director, Information Services):
"I have a small (I hope) problem:
 
I created 3 tables in the Tess database
I created 3 custom screens
I enter info for constituent XX on each custom screen
The raw info in the tables looks correct
I pull up constituent YY who has no info in any of those 3 tables
The first custom screen is blank - as it should be
The other 2 custom screens display the info for constituent XX
Virtually every constituent shows constituent XX's custom info for 2 of the 3 custom screens
 
Any idea what's happening here?"
Thanks, Tessiturians.