Hi Phill
The community builder fields only used to auto fill-in form fields on payment form. The information users entered on the form are saved into database, however, It is not saved back to to community builder profile. If users want to update their profile, they need to go to CB to Edit and Update it .
Hope my explanation is clear to you. I am sorry for lately response, just busy in the last few days to re-build joomdonation.com

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Thanks,
Tuan