Sign Flip for Control Budget into GL Budget

Summary:

When we enter Control Budgets we say to copy that into the General Ledger budget.

We are using them from 3rd party application and use Control Level = None (virtually a way to load them in). We are using Control Budget because we can enter comments and make adjustments to budget lines.

We want to ensure that the Control Budget is in sync with the General Ledger budget, but we have noticed that for Revenue account types if will flip the sign. So a -£100 control budget is showing as a +£100 budget in GL.
Is it possible to stop sign flip between control budget and GL budget? in EPM we have such option, but not in GL.