Client Tools :: Different Charactersets Show Line-break In Select Result

i have a little curiosity in result of a select statement.

One database has following characterset settings:

NLS_CHARACTERSET WE8ISO8859P15
NLS_NCHAR_CHARACTERSET AL16UTF16

and the following select statement results in multiple lines:

SQL> select INSTANCE_NAME,STATUS from v$instance;
INSTANCE_NAME
------------------------------------------------
STATUS
------------------------------------
BUP
OPEN

Another database has following characterset settings:

NLS_CHARACTERSET UTF8
NLS_NCHAR_CHARACTERSET AL16UTF16

and the same select shows only a 2 line result:

SQL> select INSTANCE_NAME,STATUS from v$instance;
INSTANCE_NAME STATUS
---------------- ------------------------------------
HPSMP OPEN

Both databases are version 10.2.0.4 and both are running on HPUX 11.31.Why do we get this differents in showing the result?

Our problem is that the package-start scripts from HP, to start a database, check the result of the select statement above and if we have the multiline result the check gives an error and stops the package again.