I am still facing same problem :(.

I have havana-2 code(https://github.com/openstack/nova/tree/2013.2.b2). 

1. Created new flavor.
[root@localhost]# nova flavor-create test.flavor 99 512 5 2
+----+------------+-----------+------+-----------+------+-------+-------------+-----------+-------------+
| ID | Name            | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public | extra_specs |
+----+------------+-----------+------+-----------+------+-------+-------------+-----------+-------------+
| 99 | test.flavor   | 512       | 5    | 0         |      | 2     | 1.0         | True      | {}          |
+----+----------+-----------+------+-----------+------+-------+-------------+-----------+-------------+

2. Check flavor.
[root@localhost]# nova flavor-show 99
+----------------------------+----------+
| Property                   | Value    |
+----------------------------+----------+
| name                       | test.flavor |
| ram                        | 512      |
| OS-FLV-DISABLED:disabled   | False    |
| vcpus                      | 2        |
| extra_specs                | {}       |
| swap                       |          |
| os-flavor-access:is_public | True     |
| rxtx_factor                | 1.0      |
| OS-FLV-EXT-DATA:ephemeral  | 0        |
| disk                       | 5        |
| id                         | 99       |
+----------------------------+----------+

3. Delete flavor and check.
[root@localhost]# nova flavor-delete 99
[root@localhost]# nova flavor-show 99
+----------------------------+----------+
| Property                   | Value    |
+----------------------------+----------+
| name                       | test.flavor |
| ram                        | 512      |
| OS-FLV-DISABLED:disabled   | False    |
| vcpus                      | 2        |
| extra_specs                | {}       |
| swap                       |          |
| os-flavor-access:is_public | True     |
| rxtx_factor                | 1.0      |
| OS-FLV-EXT-DATA:ephemeral  | 0        |
| disk                       | 5        |
| id                         | 99       |
+----------------------------+----------+

4. Create another flavor with same id (99).
[root@localhost]# nova flavor-create test.flavor.new 99 512 5 2
+----+--------------+-----------+------+-----------+------+-------+-------------+-----------+-------------+
| ID | Name         | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public | extra_specs |
+----+--------------+-----------+------+-----------+------+-------+-------------+-----------+-------------+
| 99 | test.flavor.new | 512       | 5    | 0         |      | 2     | 1.0         | True      | {}          |
+----+--------------+-----------+------+-----------+------+-------+-------------+-----------+-------------+

5. Check flavor for id (99).
[root@localhost]# nova flavor-show 99
+----------------------------+----------+
| Property                   | Value    |
+----------------------------+----------+
| name                       | test.flavor |
| ram                        | 512      |
| OS-FLV-DISABLED:disabled   | False    |
| vcpus                      | 2        |
| extra_specs                | {}       |
| swap                       |          |
| os-flavor-access:is_public | True     |
| rxtx_factor                | 1.0      |
| OS-FLV-EXT-DATA:ephemeral  | 0        |
| disk                       | 5        |
| id                         | 99       |
+----------------------------+----------+

Its return old flavor (test.flavor) instead of new (test.flavor.new).