I've found similar problem. Gnucash can't deal with parent accounts if you estimate a budget into subordinated account, and you estimate the budget with the estimation tool for the parent account, It can't summarizes the total amount.
For my experience in other programs I have two options:
1. Parent accounts is not open to fill numbers manually. It just sumarizes the subordinate
2. Allow Gnucash to recalculate the entire budget and manipulates the amount in all parents entries. You need to put a button or a command into Gnucash.
I've found similar problem. Gnucash can't deal with parent accounts if you estimate a budget into subordinated account, and you estimate the budget with the estimation tool for the parent account, It can't summarizes the total amount.
For my experience in other programs I have two options:
1. Parent accounts is not open to fill numbers manually. It just sumarizes the subordinate
2. Allow Gnucash to recalculate the entire budget and manipulates the amount in all parents entries. You need to put a button or a command into Gnucash.