Ephemeral Disk size sets to value of deleted flavour eph. disk size

I'm unable to reproduce this problem:

[rbryant@f17-devstack devstack]$ nova flavor-create --ephemeral 20 test 10 1024 20 1
+----+------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+------+-----------+------+-----------+------+-------+-------------+-----------+
| 10 | test | 1024 | 20 | 20 | | 1 | 1 | True |
+----+------+-----------+------+-----------+------+-------+-------------+-----------+
[rbryant@f17-devstack devstack]$ nova flavor-list
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| 1 | m1.tiny | 512 | 0 | 0 | | 1 | 1.0 | True |
| 2 | m1.small | 2048 | 20 | 0 | | 1 | 1.0 | True |
| 3 | m1.medium | 4096 | 40 | 0 | | 2 | 1.0 | True |
| 4 | m1.large | 8192 | 80 | 0 | | 4 | 1.0 | True |
| 5 | m1.xlarge | 16384 | 160 | 0 | | 8 | 1.0 | True |
| 10 | test | 1024 | 20 | 20 | | 1 | 1.0 | True |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
[rbryant@f17-devstack devstack]$ nova flavor-delete 10
[rbryant@f17-devstack devstack]$ nova flavor-list
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| 1 | m1.tiny | 512 | 0 | 0 | | 1 | 1.0 | True |
| 2 | m1.small | 2048 | 20 | 0 | | 1 | 1.0 | True |
| 3 | m1.medium | 4096 | 40 | 0 | | 2 | 1.0 | True |
| 4 | m1.large | 8192 | 80 | 0 | | 4 | 1.0 | True |
| 5 | m1.xlarge | 16384 | 160 | 0 | | 8 | 1.0 | True |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
[rbryant@f17-devstack devstack]$ nova flavor-create --ephemeral 10 test 10 1024 20 1
+----+------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+------+-----------+------+-----------+------+-------+-------------+-----------+
| 10 | test | 1024 | 20 | 10 | | 1 | 1 | True |
+----+------+-----------+------+-----------+------+-------+-------------+-----------+
[rbryant@f17-devstack devstack]$ nova flavor-list
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+--------...

We could not reproduce your issue. If you still reproduce it, could you provide more information (version used etc.) ?