I tried to setup a conditional field as a fee field. However, after I done that, the field is not showing in the fee ordering list. So my question is that is this possible or it is prohibited on purpose? Thanks.
Fee fields can most definitely be conditional fields. The fee ordering only matters if your fees are % instead of $. If you have the very latest version in place and you do not see a conditional fee field in the fee ordering, let us know. It will work regardless.