Fundraisers are able to edit their chosen recipient charities and the % split up until donations have been received.
Once donations have been received on a fundraising page, it is not possible to amend the charity selection or split – this is because GiveWheel provides immediate reporting to charities on donations received and fundraising pages created. To ensure this reporting is accurate and reliable, it is not possible to reallocate donations retrospectively. As GiveWheel transfers donations to charities on an ongoing monthly basis, whilst fundraising pages are running, it is also likely that the chosen charities will already have received these donations.
However, it is possible to achieve this this using GiveWheel's series functionality - this will effectively duplicate your fundraising page and allow you to change the charities on this fundraising page. This page would then be linked to the previous page to see a combined total on your new page.