After I posted this, I was able to get information from the secondary data
source (SharePoint) and put it in the default data field.  The problem that I
run into now is when I apply a filter to retrive data from the correct row in
the SharePoint list, I only get the 'lowest' row accessed (now, if I am
making sense).

For emaple:
A share point agenda list:

SUBJECT           OWNER           DURATION
New Business     Bob                   5
Old Business      Sue                  10
Discussion         Tom                 15

So on the form, I make the subject a combo box and I want the Owner and
Duration field to be populated with the corresponding data.  To do so I set
the default values of both fields to pull from SharePoint and I apply a
filter to match the subject in SharePoint with the subject in the combobox.  
These 3 fields are in a repeating table.

When I go to fill out the form, these are the resuts:

Attempt 1 (picking the first choice--Only the first row is correct)

SUBJECT           OWNER           DURATION
New Business     Bob                   5
Old Business       Bob                   5
Discussion          Bob                   5

Attempt 2 (selecting the second choice first--The first two are corect and
any more show up the same as choice 2)
SUBJECT           OWNER           DURATION
Old Business      Sue                  10
New Business     Bob                   5
Discussion          Sue                 10

And so on (if I choose the third, I get three corect, and the rest fail).

I am at the same point. . .at my wits end.