Hi Mirka
That's a tough one. It may be that there are rules for the description, which seems to be what is changed, onload.
One way to check if it's happening when you save is to download the form XML and check the values.
Go to documents -> your solution -> select the instance and click Version History

expand and see the download form XML
If you look there are the descriptions and they are the same, then it's onload rules that are changing it when you re-open the form.
If the descriptions are different, there is something changing them on save.
Hope that gives you an idea,
Sigrid
------------------------------
Sigrid Kok
Precisely Software Inc.
------------------------------