CI Data Collection Works, Just Not How I Expect it To Work

PeopleTools: 8.53; Application: Finance/SCM 9.1

ReqLineCollection.Count Doesn't Increment during Data ReqLineCollection until after the first insertion.  I've created a Component Interface to the Requisition Entry Component. If I do the following to insert lines

&oReqLineCollection = &oDdcPvReqCi.REQ_LINE;

&oReqLine = &oReqLineCollection.Item(1);

for &i = 1 to &lines.len

if i = 1 then

&oReqLine =  &oReqLineCollection.Item(1);

else

&oReqLine =  &oReqLineCollection.Item(&oReqLineCollection.count);

end-for;

The requisition created only has 1 line, and that line has the last line from &lines.  If I instead do this:

for &i = 1 to &lines.len

if i = 1 then

&oReqLine =  &oReqLineCollection.Item(1);

else

&oReqLine =  &oReqLineCollection.InsertItem(1);

end-for;

It works as expected - the last line of &lines becomes the last line of the collection, which is weird because it should be inserting each line after line 1.