Varchar2(8) field with 7 characters gives length = 8

table1
uoe varchar2(8) has a 7-character string in it 'bnorton'
when inserted into (insert into...select from)
table2
uoe varchar2(8) it becomes an 8 character string.
1. I can't tell what the extra character is.
2. temporarily goes away if I rebuild the table with the
original script
3. cannot dump the extra char with ltrim(rtrim())
4. doesn't happen with all tables in the collection
version8.1.7.2.0
stored procedure

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---------------------------------------------------+
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---------------------------------------------------+
| attività | varchar(40) | YES | | NULL | |
---------------------------------------------------+
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