Problem with batch execution

Question

I am using batch execution for inserting records in a table.
My code is as follows
// set Batch size to 1
for (i = 0; i < 23; i++) {
// set first & second columns to some value
ps.setInt(1,j);
ps.setString(2,"cat");
// execute batch
rowsInserted = ps.executeUpdate();
// send last batch (if any)
rowsInserted = ((OraclePreparedStatement)ps).sendBatch ();
// set first & second columns to some value
ps.setInt(1,100);
ps.setString(2,"dog");
// execute batch
rowsInserted = ps.executeUpdate();
Here total 25 rows were inserted.
23 rows from the loop.
remaining two rows has the same value (100,"dog")
I was expecting 24 rows in the table
23 rows from loop
no row from sendbatch since no record accumulated. (batch is of size 1)
one record from last insert statement. (100,"dog")
does anyone know why this happened?
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Answer 1

More code to figure this out may help.
Also, the term "Batch execution" doesn't apply here... you're simply adding records, near as I can tell.