1. What do the codes in the "On File" column mean?
If your device supports mouse-over tool tips, you can position your mouse over the code in question and the tool tip will give you the explanation. The column can contain collection on file (C) and various codes for DNA on file.
The possible combinations are:
C - Collection on file
I - Individual DNA on file
S - Sire verified DNA on file
D - Dam verified DNA on file
P - Parents verified DNA on file
F - Pre-2005 DNA on file