> Can anyone think why this may happen? I can also post my 
> input xml and 
> xsl files if that would help.

It would indeed help. It's very hard to debug code without seeing it. Apart
from anything else, posting your code tells us a lot about your level of
experience and therefore the kind of mistakes you are likely to make. 

The problem could easily be some slip-up in the template matching rules,
e.g. a phase-1 template rule being invoked when you intended a phase-2 rule
to fire.

Michael Kay
http://www.saxonica.com/