Order by behaviour

Hi,

We have a PostgreSQL 8.0.6 cluster configured with lc_collate=pt_BR.UTF-8
and when we run the following SELECT:
SELECT substr(nomerazao,1,4),
ascii(substr(nomerazao,1,1)),
ascii(substr(nomerazao,2,1))
from spunico.unico order by nomerazao;

is returning:

substr | ascii | ascii
--------+-------+-------
| 32 | 0
| 32 | 0
1000 | 49 | 48
1.DI | 49 | 46
1° R | 49 | 176
2M C | 50 | 77
3A.G | 51 | 65
A. A | 65 | 46
AABA | 65 | 65
A.A. | 65 | 46
A.AG | 65 | 46
A.A. | 65 | 46
A.A. | 65 | 46
ABAS | 65 | 66
ABAS | 65 | 66
ABAT | 65 | 66
A.B. | 65 | 46
A.B. | 65 | 46
ABCC | 65 | 66
A.B. | 65 | 46
A.B. | 65 | 46

Are not the lines out of order or is it a normal behaviour for a server with
lc_collate=pt_BR.UTF-8?

Thank you in advance!

Reimer