Dear Mutuku,
Many thanks for your prompt response!
To confirm if the theme is not changing the order of the form items, temporarily change the theme to bartik, and see if the items will be in order. If there are not in order, maybe some module is changing the order.
I tried, thanks. The items are also not in the right order.
So as you say it must be something else than the theme. Any idea to continue the debugging?
Thanks! Shérab.