Getting Inconsistent Query Results

Question

I am getting inconsistent results when trying to filter data based on the DATETIME stamp. Any help will be appreciated.
Here is my table information.
TableA:
SR DATE
15     8/30/2007 9:34:41 AM
16     9/4/2007 1:03:38 PM
17     9/4/2007 2:50:48 PM
18     9/4/2007 3:04:03 PM
19     9/5/2007 11:47:58 AM
20     9/5/2007 12:16:23 PM
21     9/6/2007 3:34:38 PM
22     9/6/2007 3:43:27 PM
23     9/6/2007 3:46:27 PM
24     9/7/2007 10:14:26 AM
25     9/7/2007 10:16:11 AM
26     9/18/2007 1:03:47 PM
27     9/19/2007 9:31:14 AM
28     9/19/2007 9:44:36 AM
29     9/19/2007 4:18:05 PM
30     9/21/2007 10:44:52 AM
Now if I execute this query,
SELECT * FROM TableA WHERE DATE >= '9/3/2007 9:34:41 AM'
Result (Missing all 2 digit dates:
16     9/4/2007 1:03:38 PM
17     9/4/2007 2:50:48 PM
18     9/4/2007 3:04:03 PM
19     9/5/2007 11:47:58 AM
20     9/5/2007 12:16:23 PM
21     9/6/2007 3:34:38 PM
22     9/6/2007 3:43:27 PM
23     9/6/2007 3:46:27 PM
24     9/7/2007 10:14:26 AM
25     9/7/2007 10:16:11 AM
If I change the day in query to 2 digit then I am getting correct results.
SELECT * FROM TableA WHERE DATE >= '9/03/2007 9:34:41 AM'
But If I run this query:
SELECT * FROM TableA WHERE DATE >= '9/05/2007 9:34:41 AM'
Results (Getting all the dates even less than '9/5/2007':
16     9/4/2007 1:03:38 PM
17     9/4/2007 2:50:48 PM
18     9/4/2007 3:04:03 PM
19     9/5/2007 11:47:58 AM
20     9/5/2007 12:16:23 PM
21     9/6/2007 3:34:38 PM
22     9/6/2007 3:43:27 PM
23     9/6/2007 3:46:27 PM
24     9/7/2007 10:14:26 AM
25     9/7/2007 10:16:11 AM
26     9/18/2007 1:03:47 PM
27     9/19/2007 9:31:14 AM
28     9/19/2007 9:44:36 AM
29     9/19/2007 4:18:05 PM
30     9/21/2007 10:44:52 AM
The results are so inconsistent with different combination, I could not figure out the main reason behind this.
The datatype for this field in database is "VARCHAR2(250)" and because of some restrictions, I could not change datatype of this field in the table.

Answer 1

SQL> DESC t;
Name                                      Null?    Type
COL                                                VARCHAR2(50)
SQL> SELECT col FROM t ORDER BY col;
COL
8/30/2007 9:34:41 AM
9/03/2007 9:34:41 AM
9/05/2007 9:34:41 AM
9/18/2007 1:03:47 PM
9/19/2007 4:18:05 PM
9/19/2007 9:31:14 AM
9/19/2007 9:44:36 AM
9/21/2007 10:44:52 AM
9/3/2007 9:34:41 AM
9/4/2007 1:03:38 PM
9/4/2007 2:50:48 PM
9/4/2007 3:04:03 PM
9/5/2007 11:47:58 AM
9/5/2007 12:16:23 PM
9/6/2007 3:34:38 PM
9/6/2007 3:43:27 PM
9/6/2007 3:46:27 PM
9/7/2007 10:14:26 AM
9/7/2007 10:16:11 AMThe ones in bold are your predicate "dates". Do you see why it doesn't work as you expect?
John