The value in the "Remaining" number is so counter intuitive in my mind that I think for me, I'm just going to have to ignore it completely and ensure that my left to budget is $0.00.

For me, it would make a hell of a lot more sense if the "Remaining" number was calculated as follows:

Total Inflows (for most people that will be $0.00 since most people don't budget inflows/salary/income) + Total Available Cash Balances in Bank Accounts - Budgeted Amounts For Each Category Including Budgeted Amounts for Credit Card Payments

This would formula above would give people the exact amount of available cash in their spending accounts "Remaining". The way you've explained the formula above just makes no sense to me at all.